Energy generation from heat with a solar cell built backwards
cells absorb incoming sunlight and convert a part of photon energy into
electricity. The remainder of photon energy is dissipated as heat.
Although the idea is rather counter-intuitive, 'reverse solar cell'
systems can also generate electric power by emitting rather than
absorbing photons. Such systems - known as thermoradiative cells -
generate voltage and electric power via non-equilibrium thermal
radiation of infrared photons. Thermoradiative cells offer an
opportunity to generate clean energy by harvesting radiation from
largely untapped terrestrial thermal emission sources, potentially
including the Earth itself.
Scientific Reports Article: "Entropic and Near-Field Improvements of Thermoradiative Cells"
MIT scientists invent solar-powered sponge that can boil water
specially-coated copper, and bubble wrap are components of a simple but
innovative new device that can boil water without electricity, the
Massachusetts Institute of Technology announced.
The system, which MIT compares to a sponge, can heat water to 212
degrees under just the heat of the sun, and could be used for
applications like sterilizing medical tools in settings without
electricity. It even works on cloudy days, the university said, and a
key point is that it does not need mirrors or lenses to help focus the
Nature Energy Article: "Steam generation under one sun enabled by a floating structure with thermal concentration"
Controlling light and heat on the nanoscale with hybrid optical-thermal antennas
of photons to nanoscale volumes with the aid of plasmonic nanoantennas
opened new horizons in bio(chemical) sensing and nanoscale imaging.
However, plasmon resonances are short-lived, and the photon energy
quickly dissipates as heat, creating temperature gradients on plasmonic
chips. In new work, researchers have proposed design rules to engineer
hybrid optical-thermal antennas that offer multiple functionalities in
nanoscale light and heat management.
ASC Photonics Article: "Hybrid optical-thermal antennas for enhanced light focusing and local temperature control"
|9 May 2016|
this webinar, I discuss approaches to reduce plasmonic losses, such as
modification of optical powerflow on the nanoscale, hybrid
photonic-plasmonic integration, and radiative cooling. I will also give
an overview of emerging applications of thermoplasmonics, which include
thermocatalysis, solar water treatment, cancer therapy, material
spectroscopy, nanofabrication, nanomanipulation, and magnetic
recording. The recorded presentation together with the slides is now
Volumetric solar heating of nanofluids for direct vapor generation
G. Ni, N. Miljkovic, H. Ghasemi, X. Huang, S.V. Boriskina, C.-T. Lin, J.J. Wang, Y. Xu, M.M. Rahman, T.J. Zhang, G. Chen, Nano Energy, v. 17, pp. 290–301, 2015.
Traditional solar–thermal receivers suffer from high surface
temperatures, which increase heat losses to the surroundings. To
improve performance, volumetric receivers based on nanoparticles
suspended in liquid (nanofluids) have been studied as an approach to
reduce surface losses by localizing high temperatures to the interior
of the receiver. Here, we report measured vapor generation efficiencies
of 69% at solar concentrations of 10 sun using graphitized carbon
black, carbon black, and graphene suspended in water, representing a
significant improvement in both transient and steady-state performance
over previously reported results. To elucidate the vapor generation
mechanism and validate our experimental results, we develop numerical
and analytical heat transfer models that suggest that nanofluid heating
and vapor generation occur due to classical global heating of the
suspension fluid. This work demonstrates high nanofluid-assisted vapor
generation efficiencies with potential applications in power
generation, distillation, and sterilization.
Nature Photonics News & Views: Impossible Crystals make Invisible Materials
photonic quasicrystals may act as zero-refractive-index homogeneous
materials despite their lack of translational symmetry and periodicity,
stretching wavelengths to infinity and offering applications in light
wavefront sculpting and optical cloaking.
News & Views also gives a brief intro into photonic quasicrystals
and general recipes on designing zero-index metamaterials.
Read a report on the discussions held at the recent OSA Incubator on Breaking the Limits of Optical Energy Conversion, published in Optics & Photonics News (OPN)
goal of the OSA Incubator was to map future research directions in the
optical energy conversion. To this end, we examined various conversion
platforms – old and new – through the prism of what their ultimate
performance limits are. It was clear that some of the technologies
almost reached their ceiling, while others show high promise that is
elusive in practical implementations. We hope that Incubator
discussions will guide research community and funding agencies in the
development of new conversion platforms capable of harvesting the whole
solar spectrum. These may combine photovoltaic cells, solar-thermal
engines, advanced concentrators, spectrum splitters, energy converters,
thermal emitters, and storage elements.
|June 1, 2015
Jonathan K. Tong, Wei-Chun Hsu, Yi Huang, Svetlana V. Boriskina & Gang Chen
Scientific Reports 5, Article number: 10661 doi:10.1038/srep10661
A new approach is introduced to significantly improve the performance
of thermophotovoltaic (TPV) systems using low-dimensional thermal
emitters and photovoltaic (PV) cells. By reducing the thickness of both
the emitter and the PV cell, strong spectral selectivity in thermal
emission and absorption can be achieved by confining photons in trapped
waveguide modes inside the thin-films that act as thermal analogs to
quantum wells. Simultaneously, photo-excited carriers travel shorter
distances across the thin-films reducing bulk recombination losses
resulting in a lower saturation current in the PV cell. We predict a
TPV efficiency enhancement with near-field coupling between the thermal
emitter and the PV cell up to 38.7% using a thin-film germanium (Ge)
emitter at 1000 K and an ultra-thin gallium antimonide (GaSb) cell
supported by perfect back reflectors separated by 100 nm. Even in the
far-field limit, the efficiency is predicted to reach 31.5%, which is
over an order of magnitude higher than the Shockley Queisser limit of
1.6% for a bulk GaSb cell and a blackbody emitter at 1000 K. The
proposed design approach does not require nanoscale patterning of the
emitter and PV cell surfaces, but instead offers a simple low-cost
solution to improve the performance of thermophotovoltaic systems.
Perspective: Directed Assembly of Optoplasmonic Hybrid Materials with Tunable Photonic–Plasmonic Properties
J. Phys. Chem. Lett., 2015, 6, pp 2056–2064
Optoplasmonic materials are metallo-dielectric hybrid structures that
combine metallic and dielectric components in defined geometries in
which plasmonic and photonic modes synergistically interact. These
beneficial interactions can be harnessed by integrating plasmonic
nanoantennas into defined photonic environments generated, for
instance, by discrete optical resonators or extended systems of
diffractively coupled nanoparticles. Optoplasmonic structures
facilitate photonic–plasmonic mode coupling and offer degrees of
freedom for creating optical fields with predefined amplitude and phase
in space and time that are absent in conventional photonic or plasmonic
structures. This Perspective reviews the fundamental electromagnetic
mechanisms underlying selected optoplasmonic approaches with an
emphasis on materials available through template-guided self-assembly
|24 April 2015|
L.A. Weinstein, W.-C. Hsu, S. Yerci, S.V. Boriskina, and G. Chen, "Enhanced absorption of thin-film photovoltaic cells using an optical cavity," J. of Optics, vol. 17, no. 5, 055901, 2015.
was named a "Paper of the Week" by the Journal of Optics.
|1 April 2015|
1 Jan 2015
I am excited to join the Editorial Board of the Journal of Optics as a Topical Editor for Propagation, Diffraction and Scattering
The Special Session on Photonic Atoms and Molecules (PAM) that I organize and chair @ ICTON
2015 in Budapest, Hungary, July 5-9, 2015 is currently accepting contributions.
I am excited to join the Technical Program Committee of the META 2015 Conference to be held in New York, NY on 4-7 August 2015.
the 6th International Conference on Metamaterials, Photonic Crystals
& Plasmonics will cover the entire spectrum of electromagnetic
& nanophotonic complex materials.
Y. Huang, S.V. Boriskina and G. Chen, "Electrically tunable near-field radiative heat transfer via ferroelectric materials," Appl. Phys. Lett., 105, 244102, 2014.
We explore ways to actively control near-field radiative heat transfer
between two surfaces that relies on electrical tuning of phonon modes
of ferroelectric materials. Ferroelectrics are widely used for tunable
electrical devices, such as capacitors and memory devices; however,
their tunable properties have not yet been examined for heat transfer
applications. We show via simulations that radiative heat transfer
between two ferroelectric materials can be enhanced by over two orders
of magnitude over the blackbody limit in the near field, and can be
tuned as much as 16.5% by modulating the coupling between surface
phonon polariton modes at the two surfaces via varying external
Singular and Chiral Nanoplasmonics
has been published by Pan Stanford, Singapore, Editors: S.V. Boriskina and N.I. Zheludev
“This book provides
excellent and comprehensive discussions of the rapidly emerging field
of chiral nanoplasmonics . The individual chapters are authored
by some of the pioneers of the field and provide a broad overview of a
wide range of subtopics. The book will undoubtedly serve as the
standard reference for many years to come and will be a source of
inspiration for both students and senior researchers.”
Prof. Peter Nordlander - Rice University, USA
More reviews Nature Photonics New Titles
|1 Sept 2014|
I am giving an invited talk on "Probing and Tailoring Near-Field Thermal Radiation at Extreme Separations" at NFO'13 - Near-Field Optics, Nanophotonics & Related Techniques - conference in Utah.
The new project "Full-Spectrum Stacked Solar-Thermal and PV Receiver" funded via ARPA-E FOCUS award has just started!
PI: Gang Chen (MIT)
Co-PIs: Evelyn Wang (MIT), Zhifeng Ren (University of Houston) & Svetlana V. Boriskina (MIT)
|10 June 2014|
OSA Technical Group “Optics for Energy” will be hosting an evening panel+networking session at CLEO 2014 in San Jose next week.
Svetlana V. Boriskina (MIT)
Alexander Kildishev (Purdue University)
Time & Venue:
Tuesday, June 10, 18:45-19:45 (panel discussion) 19:45-20:15
(networking time), Executive Ballroom 210F, San Jose Convention Center,
San Jose, CA
slides & movies of presentations
the next three years, I will serve as the Advisor and Chair of the OSA
Technical Group “Optics for Energy.” The group focuses on all aspects
of the use of optics in the energy field. Please do not hesitate to
contact me if you would like to get involved in the group activities.
March 14, 2014: The Art and Science of Solar Lights @ MIT Museum
by the MIT museum to explore the beauty, function, and technological
potential of solar lights through a series of discussions with MIT
scientists and 2014 Eugene McDermott Award recipient Olafur Eliasson. I
will be moderating a discussion on innovative materials. Delve into
research that will improve materials for capturing and storing solar
energy for lighting use, and brainstorm ways of creating solar lighting
with flexible materials such as textiles and paper.
2014: The Special Session on Photonic Atoms and Molecules (PAM) @ ICTON
2014 to be held in Graz, Austria, July 6-10, 2014 is currently accepting accepting contributions.
Plasmonic Materials for Energy: from Physics to Applications
Boriskina, H. Ghasemi and G. Chen
Materials Today, vol. 16, pp. 379-390, 2013
Physical mechanisms unique to plasmonic materials, which can be
exploited for the existing and emerging applications of plasmonics
for renewable energy technologies, are reviewed. The hybrid nature
of surface plasmon (SP) modes – propagating surface plasmon
polaritons (SPPs) and localized surface plasmons (LSPs) – as
collective photon–electron oscillations makes them attractive
candidates for energy applications. A high density of optical states
in the vicinity of plasmonic structures enhances light absorption
and emission, enables localized heating, and drives near-field heat
exchange between hot and cold surfaces. SP modes channel the energy
of absorbed photons directly to the free electrons, and the
generated hot electrons can be utilized in thermoelectric,
photovoltaic and photo-catalytic
platforms. The advantages and
disadvantages of using plasmonics over conventional technologies for
solar energy and waste heat harvesting are discussed, and areas
where plasmonics is expected to lead to performance improvements not
achievable by other methods are identified.
W. Ahn, Y. Hong, S.V.
Boriskina, and B.M. Reinhard
Plasmonic nanoantennas facilitate
the manipulation of light fields on deeply sub-diffraction-limited length
scales, but high dissipative losses in metals make new approaches for an
efficient energy transfer in extended on-chip integrated plasmonic circuits
mandatory. We demonstrate in this article efficient photon transfer in
discrete optoplasmonic molecules comprising gold nanoparticle (NP) dimer
antennas located in the evanescent field of a 2 μm diameter polystyrene
bead, which served as an optical microcavity (OM). The optoplasmonic
molecules were generated through a guided self-assembly strategy in which
the OMs were immobilized in binding sites generated by quartz (SiO2) or
silicon posts that contained plasmonic nanoantennas on their tips. Control
of the post height facilitated an accurate positioning of the plasmonic
antennas into the evanescent field of the whispering gallery modes located
in the equatorial plane of the OM. Cy3 and Cy5.5 dyes were tethered to the
plasmonic antennas through oligonucleotide spacers to act as on-chip light
sources. The intensity of Cy3 was found to be increased relative to that of
Cy5.5 in the vicinity of the plasmonic antennas where strongly enhanced
electric field intensity and optical density of states selectively increase
the excitation and emission rates of Cy3 due to spectral overlap with the
plasmon. The fluorescent dyes preferentially emitted into the OM, which
efficiently trapped and recirculated the photons. We experimentally
determined a relative photon transfer efficiency of 44% in non-optimized
self-assembled optoplasmonic molecules in this proof-of-principle study.
Y. Hong, M. Pourmand, S.V.
Boriskina, and B.M. Reinhard
hybrid clusters with subwavelength dimensions are fabricated by
template guided self-assembly. Elastic and inelastic scattering
spectroscopy and electromagnetic simulations reveal that hybrid
clusters comprising TiO2 nanoparticles on top of a cluster of
strongly coupled gold nanoparticles harness synergistic
electromagnetic interactions between the building blocks. This
results in a boost of the peak electric field intensity and a
redistribution of the field in the ambient medium. The complex phase
landscape in the clusters features optical vortices that enhance the
I am giving a talk
“Harnessing collective effects in photonic-plasmonic structures for
ultrasensitive detection and spectroscopy” in the frame of the Physics
colloquium at UMass Boston on Wed, Nov 21, at 1pm.
I am giving a talk “Taming
optical tornadoes on a chip: hydrodynamics-inspired plasmonic nanocircuit
design” in the frame of MIT MechE Micro Nano Seminar on Wed, October 3, at
4pm in Rm 3-270. Please, stop by if you are in Boston/Cambridge area and are
interested in plasmonics research.
Research on ultrasensitive protein
detection with a photonic-plasmonic microcavity got some news coverage:
Preview of select pages of my upcoming book chapter
with a twist: taming optical tornadoes on the nanoscale," which will
Plasmonics in metal nanostructures: Theory and
applications (T.V. Shahbazyan and M.I. Stockman Eds.) Springer
Book Series “Challenges and Advances in Computational Chemistry and Physics”
I am teaching
a short course on “Fundamentals & applications of plasmonics”
at the MIT Department of
Mechanical Engineering in June 4 & 11, 2012. The course provides an intro to
plasmonics for students and post-docs @ MIT MECHE. The course materials are
Ultrasensitive detection of a protein by optical
trapping in a photonic-plasmonic microcavity
M.A. Santiago-Cordoba, M.
Cetnikaya, S.V. Boriskina, F. Vollmer, and M.C. Demirel, J. Biophoton, Early
Microcavity and whispering
gallery mode (WGM) biosensors derive their sensitivity from
monitoring frequency shifts induced by protein binding at sites of
highly confined field intensities, where field strengths can be
further amplified by excitation of plasmon resonances in
nanoparticle layers. Here, we propose a mechanism based on optical
trapping of a protein at the site of plasmonic field enhancements
for achieving ultra sensitive detection in only microliter-scale
sample volumes, and in real-time. We demonstrate femto-Molar
sensitivity corresponding to a few 1000 s of macromolecules.
Simulations based on Mie theory agree well with the optical trapping
concept at plasmonic ‘hotspots’ locations.
I have been awarded an
OSA Senior Member designation
First call for papers is now out
The European Physical Society will
organize the 4th international topical meeting on Nanophotonics and
Metamaterials in Seefeld ski resort, Tirol, Austria on January 3-6, 2013.
Metamaterials & metadevices
Nanophotonics & nanibiophotonics
Plasmonic & plasmo-electronic
Nanophotonic, hybrid & quantum
Localization of light & optical
Online paper submission
window: Aug 1, 2012
- Oct 1, 2012
Nanoscale Feature Article
was #3 most-read paper
once again in Jan 2012, #1
most-read in Feb 2012 & #7 most-read in March 2012; highlighted
high impact plasmonic research
by Nanoscale editor
ACS Nano paper
was highlighted in the January 2012 edition of
- go to pages 77-78.
plasmonically-integrated nanovortices got some news coverage
Photonics West 2012
21 - 26 January 2012,
San Francisco, California, USA
I will be giving an
invited talk “Hybrid
optoplasmonic elements for ultra-sensitive detection and information
processing on the nanoscale” in the frame of the
NNIN/C Conference - ENCON1
Synergy Between Experiment and
Computation in Energy:
Looking to 2030
January 11-13, 2012 - Harvard University
I will be giving a talk “Plasmonically
integrated optical tornadoes for efficient light harvesting” in the frame of the
W. Ahn, S.V. Boriskina, Y.
Hong and B.M.
12 (1), 219–227, 2012.
We introduce a new design
approach for surface-enhanced Raman spectroscopy (SERS) substrates
that is based on molding the optical powerflow through a sequence of
coupled nanoscale optical vortices “pinned” to rationally designed
plasmonic nanostructures, referred to as Vortex Nanogear
Transmissions (VNTs). We fabricated VNTs composed of Au nanodiscs by
electron beam lithography on quartz substrates and characterized
their near- and far-field responses through combination of
computational electromagnetism, and elastic and inelastic scattering
spectroscopy. Pronounced dips in the far-field scattering spectra of
VNTs provide experimental evidence for an efficient light trapping
and circulation within the nanostructures. Furthermore, we
demonstrate that VNT integration into periodic arrays of Au
nanoparticles facilitates the generation of high E-field
enhancements in the VNTs at multiple defined wavelengths. We show
that spectrum shaping in nested VNT structures is achieved through
an electromagnetic feed-mechanism driven by the coherent multiple
scattering in the plasmonic arrays and that this process can be
rationally controlled by tuning the array period. The ability to
generate high E-field enhancements at predefined locations and
frequencies makes nested VNTs interesting substrates for challenging
W. Ahn, S.V. Boriskina, Y.
Hong and B.M.
Article ASAP, 2012.
photonic–plasmonic mode coupling in a new class of optoplasmonic
materials that comprise dielectric microspheres and noble metal
nanostructures in a morphologically well-defined on-chip platform.
Discrete networks of optoplasmonic elements, referred to as
optoplasmonic molecules, were generated through a combination of
top-down fabrication and template-guided self-assembly. This
approach facilitated a precise and controllable vertical and
horizontal positioning of the plasmonic elements relative to the
whispering gallery mode (WGM) microspheres. The plasmonic
nanostructures were positioned in or close to the equatorial plane
of the dielectric microspheres where the fields associated with the
plasmonic modes can synergistically interact with the evanescent
fields of the WGMs. We characterized the far-field scattering
spectra of discrete optoplasmonic molecules that comprised two
coupled 2.048 μm diameter polystyrene microspheres each encircled by
four 148 nm diameter Au nanoparticles (NPs), through far-field
scattering spectroscopy. We observed a broadening of the TE and TM
modes in the scattering spectra of the optoplasmonic dimers
indicative of an efficient photonic–plasmonic mode coupling between
the coupled photonic modes of the WGM resonators and the localized
surface plasmon modes of the NPs. Our experimental findings are
supported by generalized multiple particle Mie theory simulations,
which provide additional information about the spatial distributions
of the near fields associated with the photonic–plasmonic hybrid
modes in the investigated optoplasmonic molecules. The simulations
reveal partial localization of the spectrally sharp hybrid modes
outside of the WGM microspheres on the Au NPs where the local
E-field intensity is enhanced by approximately 2 orders of magnitude
over that of an individual Au NP.
Molding the flow of light on the nanoscale:
from vortex nanogears to phase-operated plasmonic machinery
S.V. Boriskina and B.M.
no. 4, pp. 76-90, 2012 [FEATURE ARTICLE].
text .pdf (1.22Mb)]
This article may be downloaded for personal use only.
check out a YouTube video:
Efficient delivery of
light into nanoscale volumes by converting free photons into
localized charge density oscillations (surface plasmons) enables
technological innovation in various fields from biosensing to
photovoltaics and quantum computing. Conventional plasmonic
nanostructures are designed as nanoscale analogs of radioantennas
and waveguides. Here, we discuss an alternative approach for
plasmonic nanocircuit engineering that is based on molding the
optical powerflow through ‘vortex nanogears’ around a landscape of
local phase singularities ‘pinned’ to plasmonic nanostructures. We
show that coupling of several vortex nanogears into
transmission-like structures results in dramatic optical effects,
which can be explained by invoking a hydrodynamic analogy of the
‘photon fluid’. The new concept of vortex nanogear transmissions
(VNTs) provides new design principles for the development of complex
multi-functional phase-operated photonics machinery and, therefore,
generates unique opportunities for light generation, harvesting and
processing on the nanoscale.
B. Yan, S.V. Boriskina and B.M. Reinhard
Phys. Chem C,
Article ASAP, DOI: 10.1021/jp207821t, 2011.
arrays (NCAs) are a class of electromagnetic materials that comprise
chemically defined nanoparticles assembled into clusters of defined
size in an extended deterministic arrangement. NCAs are fabricated
through integration of chemically synthesized building blocks into
predefined patterns using a hybrid top-down/bottom-up fabrication
approach that overcomes some of the limitations of conventional
top-down fabrication methods with regard to minimum available
feature size and structural complexity. NCAs can sustain near-field
interactions between nanoparticles within individual clusters as
well as between entire neighboring clusters. The availability of
near-field interactions on multiple length scales, together with the
ability to further enhance the coupled plasmon modes through
photonic modes in carefully designed array morphologies, leads to a
multiscale cascade electromagnetic field enhancement throughout the
array. This feature article introduces the design and fabrication
fundamentals of NCAs and characterizes the electromagnetic coupling
mechanisms in the arrays. Furthermore, it reviews how the optical
properties of NCAs can be tuned through the size and shape of the
nanoparticle building blocks and the geometry, size, and separation
of the assembled clusters. NCAs have potential applications in many
different areas; this feature article focuses on plasmon enhanced
biosensing and surface enhanced Raman spectroscopy, in particular.
Issue of Optics Express
“Collective phenomena in photonic, plasmonic and hybrid structures”
24 October 2011
Issue of Optics Express on Collective Phenomena in
Photonic, Plasmonic and Hybrid Structures that was published
online on Mon Oct 24, 2011.
The combination of optical, electronic and mechanical effects
occurring in devices and materials that have structure on the
nanometer scale are being investigated by researchers around the
world. These "collective phenomena" have applications as diverse as
the generation of light, optical sensing, and information
processing. To highlight the recent progress and trends in physics
and applications in this area, the editors of
published a special focus issue on
"Collective Phenomena in Photonic, Plasmonic and Hybrid Structures."
The preface to the
Focus Issue that gives a brief introduction to all the invited
papers is available
Boston University, USA
University of Southern California, USA
University of North Carolina at Charlotte, USA
King's College London, UK
University of Massachusetts Lowell, USA
S.V. Boriskina and B.M.
19(22), 22305-22315, 2011.
text .pdf (1980
This is a free access article.
A major challenge for
plasmonics as an enabling technology for quantum information
processing is the realization of active spatio-temporal control of
light on the nanoscale. The use of phase-shaped pulses or beams
enforces specific requirements for on-chip integration and imposes
strict design limitations. We introduce here an alternative
approach, which is based on exploiting the strong sub-wavelength
spatial phase modulation in the near-field of resonantly-excited
high-Q optical microcavities integrated into plasmonic nanocircuits.
Our theoretical analysis reveals the formation of areas of
circulating powerflow (optical vortices) in the near-fields of
optical microcavities, whose positions and mutual coupling can be
controlled by tuning the microcavities parameters and the excitation
wavelength. We show that optical powerflow though nanoscale
plasmonic structures can be dynamically molded by engineering
interactions of microcavity-induced optical vortices with
noble-metal nanoparticles. The proposed strategy of re-configuring
plasmonic nanocircuits via locally-addressable photonic elements
opens the way to develop chip-integrated optoplasmonic switching
architectures, which is crucial for implementation of quantum
mid-infrared plasmonic antennas with single nanoscale focal point
R. Blanchard, S.V.
Boriskina, P. Genevet, M.A. Kats, J.-P. Tetienne, N. Yu, M.O.
Scully, L. Dal Negro, and F. Capasso
19(22), 22113, 2011.
text .pdf (1635
This is a free access article.
We propose and demonstrate
a novel photonic-plasmonic antenna capable of confining
electromagnetic radiation at several mid-infrared wavelengths to a
single sub-wavelength spot. The structure relies on the coupling
between the localized surface plasmon resonance of a bow-tie
nanoantenna with the photonic modes of surrounding multi-periodic
particle arrays. Far-field measurements of the transmission through
the central bow-tie demonstrate the presence of Fano-like
interference effects resulting from the interaction of the bow-tie
antenna with the surrounding nanoparticle arrays. The near-field of
the multi-wavelength antenna is imaged using an aperture-less
near-field scanning optical microscope. This antenna is relevant for
the development of near-field probes for nanoimaging, spectroscopy
Research on hybrid optoplasmonic sensors and quantum-optical network
elements highlighted in the August 2011 issue of NanoTimes magazine
Photonics 2011 Conference (IPC11)
Photonics Society Annual Meeting)
Virginia | 9 - 13 October 2011
I will be giving an
invited talk “Hybrid optoplasmonic
microresonators and networks” in the frame of the
Special Symposium on
Innovative Optical Microresonators.
protein detection by optical shift of a resonant microcavity
M.A. Santiago-Cordoba, S.V. Boriskina,
F. Vollmer and M.C. Demirel
Appl. Phys. Lett.,
99, 073701, 2011.
text .pdf (872
This article may be downloaded for personal use only.
We demonstrated a
biosensing approach which, for the first time, combines the high
sensitivity of whispering gallery modes (WGMs) with a metallic
nanoparticle-based assay. We provided a computational model based on
generalized Mie theory to explain the higher sensitivity of protein
detection. We quantitatively analyzed the binding of a model protein
(i.e., Bovine Serum Albumin) to gold nanoparticles from high-Q WGM
resonance frequency shifts, and fit the results to an adsorption
isotherm, which agrees with the theoretical predictions of a
two-component adsorption model.
J. Wang, S.V. Boriskina,
H. Wang, and B.M. Reinhard
5 (8), pp 6619–6628, 2011.
Filopodia have been
hypothesized to act as remote sensors of the cell environment, but
many details of the sensor function remain unclear. We investigated
the distribution of the epidermal growth factor (EGF) receptor (EGFR)
density on filopodia and on the dorsal cell membrane of A431 human
epidermoid carcinoma cells using a nanoplasmonic enabled imaging
tool. We targeted cell surface EGFR with 40 nm diameter Au
nanoparticles (NPs) using a high affinity multivalent labeling
strategy and determined relative NP binding affinities spatially
resolved through plasmon coupling. Distance-dependent near-field
interactions between the labels generated a NP density (ρ)-dependent
spectral response that facilitated a spatial mapping of the EGFR
density distribution on subcellular length scales in an optical
microscope in solution. The measured ρ values were significantly
higher on filopodia than on the cellular surface, which is
indicative of an enrichment of EGFR on filopodia. A detailed
characterization of the spatial distribution of the NP immunolabels
through scanning electron microscopy (SEM) confirmed the findings of
the all-optical plasmon coupling studies and provided additional
structural details. The NPs exhibited a preferential association
with the sides of the filopodia. We calibrated the ρ-dependent
spectral response of the Au immunolabels through correlation of
optical spectroscopy and SEM. The experimental dependence of the
measured plasmon resonance wavelength (λres) of the
interacting immunolabels on ρ was well described by the fit λres
= 595.0 nm – 46.36 nm exp(−ρ/51.48) for ρ ≤ 476 NPs/μm2.
The performed correlated spectroscopic/SEM studies pave the way
toward quantitative immunolabeling studies of EGFR and other
important cell surface receptors in an optical microscope.
nanostructures for photonics & plasmonics applications
L. Dal Negro and S.V. Boriskina
and Photonics Reviews,
published online ahead of print, 2011.
text .pdf (5.98
This article may be downloaded for personal use only.
This review focuses
on the optical properties and device applications of deterministic
aperiodic media generated by mathematical rules with spectral
features that interpolate in a tunable fashion between periodic
crystals and disordered random media. These structures are called
Deterministic Aperiodic Nano Structures (DANS) and can be
implemented in different materials (linear and nonlinear) and
physical systems as diverse as dielectric multilayers, optical
gratings, photonic waveguides and nanoparticle arrays. Among their
distinctive optical properties are the formation of multi-fractal
bandgaps and characteristic optical resonances, called critical
modes, with unusual localization, scaling and transport properties.
The goal of the paper is to provide a detailed review of the
conceptual foundation and the physical mechanisms governing the
complex optical response of DANS in relation to the engineering of
novel devices and functionalities. The discussion will mostly focus
on passive and active planar structures with enhanced light-matter
coupling for photonics and plasmonics technologies.
Lasing in Thue-Morse Structures
with Optimized Aperiodicity
H. Noh, J.-K. Yang , S.V. Boriskina, M.J. Rooks,
G.G. Solomon, L. Dal Negro and H. Cao
Phys. Lett., vol. 98, 201109, 2011.
text .pdf (605
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We demonstrate lasing in two-dimensional
Thue–Morse structures fabricated in a semiconductor
membrane. By changing the relative size of two scatterers
that correspond to the building blocks A and B, we gradually
vary structural aperiodicity and find an optimal degree of
aperiodicity where light confinement is maximal and lasing
is the strongest. At various degrees of aperiodicity,
different types of modes acquire the highest quality factors
and may be selected for lasing. This work opens a way of
controlling lasing characteristic via structural
Special session on Photonic Atoms & Molecules at ICTON 2011
Stockholm, Sweden, June 26 - 30, 2011
Special Session on
Photonic Atoms & Molecules will be traditionally held as a part of
the International Conference on Transparent Optical Networks
(ICTON’11), this year, in Stockholm, Sweden.
Previous ICTON attendees
will notice the slight change in the Special Session name, which reflects
its new expanded scope. Starting in 2011, I would like to invite
contributions in the emerging area of plasmonics that focuses on the
properties and applications of plasmonic atoms and molecules. Similar to the
confined photon states in microcavities, localized surface plasmon
resonances on metal nanoparticles have properties resembling those of
confined electron states in atoms, giving rise to the terms ‘photonic atoms’
and ‘plasmonic atoms’, respectively. Interaction between light and matter in
photonic & plasmonic atoms can be enhanced and manipulated via their mutual
electromagnetic coupling when individual atoms are arranged into artificial
molecules, which paves the way to a variety of exciting applications in
basic science and technology.
reflect and merge the latest trends in the photonics and plasmonics, in 2011
the Special Session will focus on latest developments in theory and design
of atoms and molecules of light as well as their applications in biomedical
research, communications, environmental sensing, and classical and quantum
optical information processing. The program will include invited and
contributed papers as well as poster presentations.
Bo Yan, Svetlana
V. Boriskina, and Bjoern M. Reinhard
J. Phys. Chem. C,
115 (11), pp 4578–4583
Nanoparticle cluster arrays (NCAs) are novel electromagnetic materials
whose properties depend on the size and shape of the constituent
nanoparticle clusters. A rational design of NCAs with defined
optical properties requires a thorough understanding of the
geometry-dependent optical response of the building blocks. Herein,
we systematically investigate the near- and far-field responses of
clusters of closely packed 60 nm gold nanoparticles (n ≤ 7)
as a function of size and cluster geometry through a combination of
experimental spectroscopy and generalized Mie theory calculations.
From all of the investigated cluster configurations, nanoparticle
trimers with D3h geometry and heptamers in
D6h geometry stand out due to their
polarization-insensitive responses and high electric (E)
field intensity enhancements, making them building blocks of choice
in this size range. The near-field intensity maximum of the D6h
heptamer is red-shifted with regard to the D3h
trimer by 125 nm, which confirms the possibility of a rational
tuning of the near-field response in NCAs through the choice of the
constituent nanoparticle clusters. For the nanoparticle trimer we
investigate the influence of the cluster geometry on the optical
response in detail and map near- and far-field spectra associated
with the transition of the cluster configuration from D3h
Jing Wang, Linglu
Yang, Svetlana V. Boriskina, Bo Yan, and Bjoern M. Reinhard
83 (6), pp 2243–2249
Nanoparticle cluster arrays (NCAs) are
engineered two-dimensional plasmonic arrays that provide high signal
enhancements for critical sensing applications using surface
enhanced Raman spectroscopy (SERS). In this work we demonstrate that
rationally designed NCAs are capable of detecting ultra-traces of
2,4-dinitrotoluene (DNT) vapor. NCAs functionalized with a thin film
of an aqueous NaOH solution facilitated the detection of DNT vapor
at a concentration of at least 10 ppt, even in the presence of an
excess of potential interferents, including Diesel fuel,
fertilizers, and pesticides. Both in the presence and in the absence
of this complex background the SERS signal intensity of the NO2
stretching mode showed a continuous, concentration dependent
response over the entire monitored concentration range (10 ppt−100
ppb). The small size, superb sensitivity, and selectivity, as well
as the fast response time of <5 min, make NCAs a valuable photonic
sensor platform for ultra-trace nitroaromatic gas vapor detection
with potential applications in landmine removal and homeland
Spectrally and Spatially
Configurable Superlenses for Optoplasmonic Nanocircuits
and B.M. Reinhard
Proc. Natl. Acad. Sci. USA,
2011, vol. 108,
no. 8, pp.
text .pdf (1.73
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Energy transfer between photons and molecules and between
neighboring molecules is ubiquitous in living nature, most
prominently in photosynthesis. While energy transfer is
efficiently utilized by living systems, its adoption to
connect individual components in man-made plasmonic
nanocircuits has been challenged by low transfer
efficiencies that motivate the development of entirely new
concepts for energy transfer. We introduce herein
optoplasmonic superlenses that combine the capability of
optical microcavities to insulate molecule-photon systems
from decohering environmental effects with the superior
light nanoconcentration properties of nanoantennas. The
proposed structures provide significant enhancement of the
emitter radiative rate and efficient long-range transfer of
emitted photons followed by subsequent refocusing into
nanoscale volumes accessible to near- and far-field
detection. Optoplasmonic superlenses are versatile building
blocks for optoplasmonic nanocircuits and can be used to
construct “dark” single-molecule sensors, resonant
amplifiers, nanoconcentrators, frequency multiplexers,
demultiplexers, energy converters & dynamical switches.