Plasmonic Resonances in Ag–Au Nanosphere Heterodimers: How Accurate Are the Approximate Analytical Descriptions?

2020 ◽  
Vol 124 (25) ◽  
pp. 13858-13871
Author(s):  
Anvy Kuriakose ◽  
Gopal Narmada Naidu ◽  
Rotti Srinivasamurthy Swathi
Keyword(s):  
Au Nanosphere

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.

Creating a Nanoscale “Black Hole” to Trap Light by a Single Au Nanosphere in an All-Dielectric Nanocavity

2018 ◽  
Vol 6 (20) ◽  
pp. 1800366 ◽  
Author(s):  
Yingcong Huang ◽  
Jiahao Yan ◽  
Churong Ma ◽  
Guowei Yang
Keyword(s):  
Black Hole ◽  
Au Nanosphere

Simultaneous Imaging and Selective Photothermal Therapy through Aptamer-Driven Au Nanosphere Clustering

2018 ◽  
Vol 10 (2) ◽  
pp. 183-188 ◽  
Author(s):  
Zhenping Guan ◽  
Taishi Zhang ◽  
Hai Zhu ◽  
Da Lyu ◽  
Sreelatha Sarangapani ◽  
...  
Keyword(s):  
Photothermal Therapy ◽  
Simultaneous Imaging ◽  
Au Nanosphere

scholarly journals Phospholipid Encapsulated AuNR@Ag/Au Nanosphere SERS Tags with Environmental Stimulus Responsive Signal Property

2016 ◽  
Vol 8 (16) ◽  
pp. 10201-10211 ◽  
Author(s):  
Xueming Su ◽  
Yunqing Wang ◽  
Wenhai Wang ◽  
Kaoxiang Sun ◽  
Lingxin Chen
Keyword(s):  
Environmental Stimulus ◽  
Stimulus Responsive ◽  
Au Nanosphere ◽  
Sers Tags

Dielectric Nanocup Coating Effect on the Resonant Optical Properties of Individual Au Nanosphere

Plasmonics ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. 1523-1527 ◽  
Author(s):  
ChaoLing Du ◽  
JianPing Dong ◽  
Tao Chen ◽  
ChongJun He ◽  
DaNing Shi
Keyword(s):  
Optical Properties ◽  
Au Nanosphere

Enhanced up-conversion luminescence from NaYF4:Yb,Er nanocrystals by Gd3+ ions induced phase transformation and plasmonic Au nanosphere arrays

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 102869-102874 ◽  
Author(s):  
Yangqing Wu ◽  
Shaobing Lin ◽  
Wenyi Shao ◽  
Xiaowei Zhang ◽  
Jun Xu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Hydrothermal Method ◽  
Au Nanosphere

NaYF4:Yb,Er nanocrystals with different concentrations of Gd3+ ions are prepared via a hydrothermal method.

scholarly journals Dual Plasmon Resonances and Tunable Electric Field in Structure-Adjustable Au Nanoflowers for Improved SERS and Photocatalysis

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2176
Author(s):  
Yi-Xin Zhao ◽  
Hao-Sen Kang ◽  
Wen-Qin Zhao ◽  
You-Long Chen ◽  
Liang Ma ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electric Fields ◽  
Plasmon Resonance ◽  
Plasmon Coupling ◽  
Plasmon Excitation ◽  
Dipole Resonance ◽  
Template Process ◽  
Plasmon Resonances ◽  
Strong Electric Fields ◽  
Au Nanosphere

Flower-like metallic nanocrystals have shown great potential in the fields of nanophononics and energy conversion owing to their unique optical properties and particular structures. Herein, colloid Au nanoflowers with different numbers of petals were prepared by a steerable template process. The structure-adjustable Au nanoflowers possessed double plasmon resonances, tunable electric fields, and greatly enhanced SERS and photocatalytic activity. In the extinction spectra, Au nanoflowers had a strong electric dipole resonance located around 530 to 550 nm. Meanwhile, a longitudinal plasmon resonance (730~760 nm) was obtained when the number of petals of Au nanoflowers increased to two or more. Numerical simulations verified that the strong electric fields of Au nanoflowers were located at the interface between the Au nanosphere and Au nanopetals, caused by the strong plasmon coupling. They could be further tuned by adding more Au nanopetals. Meanwhile, much stronger electric fields of Au nanoflowers with two or more petals were identified under longitudinal plasmon excitation. With these characteristics, Au nanoflowers showed excellent SERS and photocatalytic performances, which were highly dependent on the number of petals. Four-petal Au nanoflowers possessed the highest SERS activity on detecting Rhodamine B (excited both at 532 and 785 nm) and the strongest photocatalytic activity toward photodegrading methylene blue under visible light irradiation, caused by the strong multi-interfacial plasmon coupling and longitudinal plasmon resonance.

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