An improved, non-functionalized route to plasmonic nanoparticle based cellular probing through osmolyte mediation (Conference Presentation)

2017 ◽  
Author(s):  
Soumik Siddhanta ◽  
Ishan Barman
Keyword(s):  
Plasmonic Nanoparticle

Size-dependent emission of a dipole coupled to a metal nanoparticle

MRS Advances ◽  
2020 ◽  
Vol 5 (62) ◽  
pp. 3315-3325
Author(s):  
Viktoriia Savchuk ◽  
Arthur R. Knize ◽  
Pavlo Pinchuk ◽  
Anatoliy O. Pinchuk
Keyword(s):  
Numerical Analysis ◽  
Quantum Yield ◽  
Electric Dipole ◽  
Incident Radiation ◽  
Metal Nanoparticle ◽  
Plasmonic Nanoparticle ◽  
Size Dependent ◽  
Emission Enhancement ◽  
Electric Dipoles

AbstractWe present a systematic numerical analysis of the quantum yield of an electric dipole coupled to a plasmonic nanoparticle. We observe that the yield is highly dependent on the distance between the electric dipole and the nanoparticle, the size and permittivity of the nanoparticle, and the wavelength of the incident radiation. Our results indicate that enhancement of the quantum yield is only possible for electric dipoles coupled to a nanoparticle with a radius of 20 nm or larger. As the size of the nanoparticle is increased, emission enhancement occurs at wavelengths dependent on the coupling distance.

scholarly journals Strong coupling of a plasmonic nanoparticle to a semiconductor nanowire

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yingying Jin ◽  
Liu Yang ◽  
Chenxinyu Pan ◽  
Zhangxing Shi ◽  
Bowen Cui ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Coupled System ◽  
Resonance Wavelength ◽  
Transverse Magnetic ◽  
Spectral Shift ◽  
Au Nanoparticle ◽  
Localized Surface Plasmon ◽  
Nanowire Diameter ◽  
Plasmonic Nanoparticle ◽  
Au Nanosphere

Abstract By placing a single Au nanoparticle on the surface of a cadmium sulfide (CdS) nanowire, we demonstrate strong coupling of localized surface plasmon resonance (LSPR) modes in the nanoparticle and whispering gallery modes (WGMs) in the nanowire. For a 50-nm-diameter Au-nanosphere particle, strong coupling occurs when the nanowire diameter is between 300 and 600 nm, with a mode splitting up to 80 meV. Using a temperature-induced spectral shift of the resonance wavelength, we also observe the anticrossing behavior in the strongly coupled system. In addition, since the Au nanosphere has spherical symmetry, the supported LSPR mode can be selectively coupled with transverse electric (TE) and transverse magnetic (TM) WGMs in the nanowire. The ultracompact strong-coupling system shown here may provide a versatile platform for studying hybrid “photon–plasmon” nanolasers, nonlinear optical devices, and nanosensors.

scholarly journals Effects of gap thickness and emitter location on the photoluminescence enhancement of monolayer MoS2 in a plasmonic nanoparticle-film coupled system

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 2097-2105
Author(s):  
Xiaozhuo Qi ◽  
Tsz Wing Lo ◽  
Di Liu ◽  
Lantian Feng ◽  
Yang Chen ◽  
...  
Keyword(s):  
Near Field ◽  
Central Area ◽  
Field Enhancement ◽  
Coupled System ◽  
Film Structure ◽  
Plasmonic Nanoparticle ◽  
Emitter Location ◽  
Radiation Properties ◽  
Radiation Enhancement ◽  
Quantum Emitters

AbstractPlasmonic nanocavities comprised of metal film-coupled nanoparticles have emerged as a versatile nanophotonic platform benefiting from their ultrasmall mode volume and large Purcell factors. In the weak-coupling regime, the particle-film gap thickness affects the photoluminescence (PL) of quantum emitters sandwiched therein. Here, we investigated the Purcell effect-enhanced PL of monolayer MoS2 inserted in the gap of a gold nanoparticle (AuNP)–alumina (Al2O3)–gold film (Au Film) structure. Under confocal illumination by a 532 nm CW laser, we observed a 7-fold PL peak intensity enhancement for the cavity-sandwiched MoS2 at an optimal Al2O3 thickness of 5 nm, corresponding to a local PL enhancement of ∼350 by normalizing the actual illumination area to the cavity’s effective near-field enhancement area. Full-wave simulations reveal a counterintuitive fact that radiation enhancement comes from the non-central area of the cavity rather than the cavity center. By scanning an electric dipole across the nanocavity, we obtained an average radiation enhancement factor of about 65 for an Al2O3 spacer thickness of 4 nm, agreeing well with the experimental thickness and indicating further PL enhancement optimization. Our results indicate the importance of configuration optimization, emitter location and excitation condition when using such plasmonic nanocavities to modulate the radiation properties of quantum emitters.

Gap-dependent SERS effect of ordered composite plasmonic nanoparticle arrays and its application for detection of sodium saccharin

2021 ◽  
Vol 112 ◽  
pp. 110788
Author(s):  
Shaosong Yang ◽  
Guangqiang Liu ◽  
Luping Meng ◽  
Xing Wang ◽  
Ying Xiong ◽  
...  
Keyword(s):  
Nanoparticle Arrays ◽  
Plasmonic Nanoparticle ◽  
Sodium Saccharin

Self-Assembled Plasmonic Nanoparticle Clusters

Science ◽  
2010 ◽  
Vol 328 (5982) ◽  
pp. 1135-1138 ◽  
Author(s):  
J. A. Fan ◽  
C. Wu ◽  
K. Bao ◽  
J. Bao ◽  
R. Bardhan ◽  
...  
Keyword(s):  
Plasmonic Nanoparticle ◽  
Nanoparticle Clusters ◽  
Self Assembled

Laser-assisted photothermal heating of a plasmonic nanoparticle-suspended droplet in a microchannel

The Analyst ◽  
2015 ◽  
Vol 140 (5) ◽  
pp. 1535-1542 ◽  
Author(s):  
Timothy Walsh ◽  
Jungchul Lee ◽  
Keunhan Park
Keyword(s):  
Present Article ◽  
Experimental Investigations ◽  
Plasmonic Nanoparticle ◽  
Photothermal Heating ◽  
Suspended Droplet ◽  
Plasmonic Particles

The present article reports the numerical and experimental investigations on the laser-assisted photothermal heating of a nanoliter-sized droplet in a microchannel when plasmonic particles are suspended in the droplet.

Two-Dimensional Plasmonic Nanoparticle as a Nanoscale Sensor to Probe Polymer Brush Formation

2017 ◽  
Vol 89 (14) ◽  
pp. 7541-7548 ◽  
Author(s):  
Assad U. Khan ◽  
Clayton Scruggs ◽  
David Hicks ◽  
Guoliang Liu
Keyword(s):  
Polymer Brush ◽  
Two Dimensional ◽  
Plasmonic Nanoparticle ◽  
Nanoscale Sensor
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