Search query: plasmon strong polymerization

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abstract: Localized surface plasmon resonances (LSPRs) typically arise in nanostructures of noble metals resulting in enhanced and geometrically tunable absorption and scattering resonances. LSPRs, however, are not limited to nanostructures of metals and can also be achieved in semiconductor nanocrystals with appreciable free carrier concentrations. Here, we describe well defined LSPRs arising from p type carriers in vacancy doped semiconductor quantum dots (QDs) Achievement of LSPRs by free carrier doping of a semiconductor nanocrystal would allow active on chip control of LSPR responses. Plasmonic sensing and manipulation of solid state processes in single nanocrystals constitutes another interesting possibility. We also demonstrate that doped semiconductor QDs allow realization of LSPRs and quantum confined excitons within the same nanostructure, opening up the possibility of strong coupling of photonic and electronic modes, with implications for light harvesting, nonlinear optics, and quantum information processing.
author_names: Joseph M Luther

Prashant K Jain

Trevor Ewers

A Paul Alivisatos
title: Localized surface plasmon resonances arising from free carriers in doped quantum dots.
venue: Nature materials
year: 2011

abstract: Visualizing individual molecules with chemical recognition is a longstanding target in catalysis, molecular nanotechnology and biotechnology. Molecular vibrations provide a valuable 'fingerprint' for such identification. Vibrational spectroscopy based on tip enhanced Raman scattering allows us to access the spectral signals of molecular species very efficiently via the strong localized plasmonic fields produced at the tip apex. However, the best spatial resolution of the tip enhanced Raman scattering imaging is still limited to 3 15 nanometres, which is not adequate for resolving a single molecule chemically. Here we demonstrate Raman spectral imaging with spatial resolution below one nanometre, resolving the inner structure and surface configuration of a single molecule. This is achieved by spectrally matching the resonance of the nanocavity plasmon to the molecular vibronic transitions, particularly the downward transition responsible for the emission of Raman photons. This matching is made possible by the extremely precise tuning capability provided by scanning tunnelling microscopy. Experimental evidence suggests that the highly confined and broadband nature of the nanocavity plasmon field in the tunnelling gap is essential for ultrahigh resolution imaging through the generation of an efficient double resonance enhancement for both Raman excitation and Raman emission. Our technique not only allows for chemical imaging at the single molecule level, but also offers a new way to study the optical processes and photochemistry of a single molecule.
author_names: R Zhang

Yongsheng Zhang

Zhenchao Dong

S L Jiang

C Zhang

L G Chen

Leining Zhang

Yuan Liao

Javier Aizpurua

Y Luo

J L Yang

J G Hou
title: Chemical mapping of a single molecule by plasmon enhanced Raman scattering
venue: Nature
year: 2013

abstract: In this review we look at the concepts and state of the art concerning the strong coupling of surface plasmon polariton modes to states associated with quantum emitters such as excitons in J aggregates, dye molecules and quantum dots. We explore the phenomenon of strong coupling with reference to a number of examples involving electromagnetic fields and matter. We then provide a concise description of the relevant background physics of surface plasmon polaritons. An extensive overview of the historical background and a detailed discussion of more recent relevant experimental advances concerning strong coupling between surface plasmon polaritons and quantum emitters is then presented. Three conceptual frameworks are then discussed and compared in depth: classical, semi classical and fully quantum mechanical; these theoretical frameworks will have relevance to strong coupling beyond that involving surface plasmon polaritons. We conclude our review with a perspective on the future of this rapidly emerging field, one we are sure will grow to encompass more intriguing physics and will develop in scope to be of relevance to other areas of science.
author_names: Paivi Torma

William L Barnes
title: Strong coupling between surface plasmon polaritons and emitters: a review.
venue: Reports on progress in physics. Physical Society
year: 2015

abstract: Since 2000, there has been an explosion of activity in the field of plasmon enhanced Raman spectroscopy (PERS) including surface enhanced Raman spectroscopy (SERS) tip enhanced Raman spectroscopy (TERS) and shell isolated nanoparticle enhanced Raman spectroscopy (SHINERS) In this Review, we explore the mechanism of PERS and discuss PERS hotspots nanoscale regions with a strongly enhanced local electromagnetic field that allow trace molecule detection, biomolecule analysis and surface characterization of various materials. In particular, we discuss a new generation of hotspots that are generated from hybrid structures combining PERS active nanostructures and probe materials, which feature a strong local electromagnetic field on the surface of the probe material. Enhancement of surface Raman signals up to five orders of magnitude can be obtained from materials that are weakly SERS active or SERS inactive. We provide a detailed overview of future research directions in the field of PERS, focusing on new PERS active nanomaterials and nanostructures and the broad application prospect for materials science and technology. Assisted by rationally designed novel plasmonic nanostructures, surface enhanced Raman spectroscopy has presented a new generation of analytical tools (that is, tip enhanced Raman spectroscopy and shell isolated nanoparticle enhanced Raman spectroscopy) with an extremely high surface sensitivity, spatial resolution and broad application for materials science and technology.
author_names: Song-Yuan Ding

Jun Yi

Jian-feng Li

Bin Ren

De-Yin Wu

Rajapandiyan Panneerselvam

Zhongqun Tian
title: Nanostructure based plasmon enhanced Raman spectroscopy for surface analysis of materials
year: 2016

abstract: Plasmons in doped graphene exhibit relatively large confinement and long lifetime compared to noble metal plasmons. Here, we study the propagation properties of plasmons guided along individual and interacting graphene nanoribbons. Besides their tunability via electrostatic gating, an additional handle to control these excitations is provided by the dielectric environment and the relative arrangement of the interacting waveguides. Plasmon interaction and hybridization in pairs of neighboring aligned ribbons are shown to be strong enough to produce dramatic modifications in the plasmon field profiles. We introduce a universal scaling law that considerably simplifies the analysis an understanding of these plasmons. Our work provides the building blocks to construct graphene plasmon circuits for future compact plasmon devices with potential application to optical signal processing, infrared sensing, and quantum information technology.
author_names: Johan Christensen

Alejandro Manjavacas

Sukosin Thongrattanasiri

Frank H L Koppens

F Javier Garcia de Abajo
title: Graphene plasmon waveguiding and hybridization in individual and paired nanoribbons.
venue: ACS nano
year: 2012

abstract: In this review we look at the concepts and state of the art concerning the strong coupling of surface plasmon polariton modes to states associated with quantum emitters such as excitons in J aggregates, dye molecules and quantum dots. We explore the phenomenon of strong coupling with reference to a number of examples involving electromagnetic fields and matter. We then provide a concise description of the relevant background physics of surface plasmon polaritons. An extensive overview of the historical background and a detailed discussion of more recent relevant experimental advances concerning strong coupling between surface plasmon polaritons and quantum emitters is then presented. Three conceptual frameworks are then discussed and compared in depth: classical, semi classical and fully quantum mechanical; these theoretical frameworks will have relevance to strong coupling beyond that involving surface plasmon polaritons. We conclude our review with a perspective on the future of this rapidly emerging field, one we are sure will grow to encompass more intriguing physics and will develop in scope to be of relevance to other areas of science. PACS numbers: 33.80. b, 73.20.Mf, 42.50.Nn Submitted to: Rep. Prog. Phys. ar X iv :1 40 5. 16 61 v1 ph ys ic s. op tic s] 7 M ay 2 01 4 Strong coupling between surface plasmon polaritons and emitters 2
author_names: Paivi Torma

William L Barnes
title: Strong coupling between surface plasmon polaritons and emitters
year: 2018

abstract: We report on the strong polarization dependence of the plasmon enhanced fluorescence on single gold nanorods. The fluorescence from the organic fluorophores that are embedded in a mesostructured silica shell around individual gold nanorods is enhanced by the longitudinal plasmon resonance of the nanorods. Our electrostatic calculations show that under an off resonance excitation, the electric field intensity contour around a nanorod rotates away from the length axis as the excitation polarization is varied. The polarization dependence of the plasmon enhanced fluorescence is ascribed to the dependence of the averaged electric field intensity enhancement within the silica shell on the excitation polarization. The measured fluorescence enhancement factor is in very good agreement with that obtained from the electrostatic calculations. The fluorescence enhancement factor increases as the longitudinal plasmon wavelength is synthetically tuned close to the excitation wavelength. In addition, the polarization dependence is used to determine the orientation angle of the gold nanorods. The results are in excellent agreement with the actual measurements. Furthermore, the emission spectrum of the fluorophore is modified by the longitudinal plasmon resonance of the gold nanorods. A linear correlation between the emission peak wavelength and the longitudinal plasmon wavelength is obtained.
author_names: Tian Ming

Lei Zhao

Zhi Yang

Huanjun Chen

Ling-Dong Sun

Jianfang Wang

Chunhua Yan
title: Strong polarization dependence of plasmon enhanced fluorescence on single gold nanorods.
venue: Nano letters
year: 2009

abstract: In Forster resonance energy transfer (FRET) energy non radiatively transfers from a blue shifted emitter to a red shifted absorber by dipole dipole coupling. This study shows that plasmonics enables the opposite transfer direction, transferring the plasmonic energy towards the short wavelength direction to induce charge separation in a semiconductor. Plasmon induced resonance energy transfer (PIRET) differs from FRET because of the lack of a Stoke's shift, non local absorption effects and a strong dependence on the plasmon's dephasing rate and dipole moment. PIRET non radiatively transfers energy through an insulating spacer layer, which prevents interfacial charge recombination losses and dephasing of the plasmon from hot electron transfer. The distance dependence of dipole dipole coupling is mapped out for a range of detuning across the plasmon resonance. PIRET can efficiently harvest visible and near infrared sunlight with energy below the semiconductor band edge to help overcome the constraints of band edge energetics for single semiconductors in photoelectrochemical cells, photocatalysts and photovoltaics. Plasmon induced resonance energy transfer is revealed and explored for solar energy harvesting from visible and near infrared light.
author_names: Jiangtian Li

Scott K Cushing

Fanke Meng

Tess R Senty

A D Bristow

Nianqiang Wu
title: Plasmon induced resonance energy transfer for solar energy conversion
year: 2015

abstract: We demonstrate the possibility to achieve optical triggering of photochemical reactions via two photon absorption using incoherent light sources. This is accomplished by the use of arrays of gold nanoparticles, specially tailored with high precision to obtain high near field intensity enhancement.
author_names: Kosei Ueno

Saulius Juodkazis

Toshiyuki Shibuya

Yukie Yokota

Vygantas Mizeikis

Keiji Sasaki

Hiroaki Misawa
title: Nanoparticle plasmon assisted two photon polymerization induced by incoherent excitation source.
venue: Journal of the American Chemical Society
year: 2008

abstract: Titanium(IV) oxide (TiO2) having both small platinum (Pt) nanoparticles and large gold (Au) particles without alloying and nanoparticle coagulation was successfully prepared by the combination of traditional photodeposition of Pt in the presence of a hole scavenger (PH) and subsequent Au colloid photodeposition in the presence of a hole scavenger (CPH) onto TiO2 Pt. Au particles having an average diameter of 13 nm were fixed on both TiO2 and TiO2 Pt samples without change in the original size of Au particles, and the Au/TiO2 and Au/TiO2 Pt samples exhibited strong photoabsorption around 550 nm as a result of surface plasmon resonance (SPR) of Au to which the large size of Au particles was attributed. Bare TiO2, TiO2 Pt, Au/TiO2, and Au/TiO2 Pt samples were used for photoinduced hydrogen (H2) formation from 2 propanol in aqueous solutions under irradiation of visible light. The first two samples yielded no H2 because of no response to visible light, but the latter two formed H2, indicating that SPR photoab.
author_names: Atsuhiro Tanaka

Satoshi Sakaguchi

Keiji Hashimoto

Hiroshi Kominami
title: Preparation of Au/TiO2 with Metal Cocatalysts Exhibiting Strong Surface Plasmon Resonance Effective for Photoinduced Hydrogen Formation under Irradiation of Visible Light
year: 2013