scholarly journals Анизотропия оптических свойств металлических нанодисков

2021 ◽  
Vol 129 (11) ◽  
pp. 1435
Author(s):  
А.В. Коротун ◽  
Н.И. Павлище
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Cross Sections ◽  
Plasmon Resonance ◽  
Polarizability Tensor ◽  
Absorption Cross ◽  
Aspect Ratios ◽  
Resonance Frequencies ◽  
Frequency Dependences ◽  
Significant Factors

Expressions for the diagonal components of the polarizability tensor, absorption cross sections, and dimensional dependences of the surface plasmon resonance frequencies of metal nanodisks are obtained in the work in the classical approximation. Calculations of the frequency and size dependences of these characteristics for disks of different metals and with different aspect ratios are presented. The influence of the aspect ratio on the evolution of the frequency dependences of the components of the polarizability tensor and absorption cross sections is analyzed. The most significant factors influencing the splitting of the surface plasmon resonance in metal nanodisks with a small asect ratio have been determined.

Gold Nanorods: From Synthesis to Optical Properties

2014 ◽  
Vol 602-603 ◽  
pp. 993-997
Author(s):  
Gui Jun Ban ◽  
Xiu Li Fu ◽  
Zhi Jian Peng
Keyword(s):  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Excitation Wavelength ◽  
Surface Plasmon Resonance Peak ◽  
Plasmon Resonance Peak ◽  
Aspect Ratios

Gold nanorods with different aspect ratios, exhibiting localized surface plasmon resonance in a tuned longitudinal mode, were prepared by employing a seed mediated growth approach. Their third-order nonlinear optical properties were investigated by using femtosecond Z-scan technique at 800 nm. All the prepared gold nanorods with different aspect ratios exhibited a reverse saturation absorbance behavior, and the value of effective nonlinear absorption coefficient reaches its maximum when the longitudinal surface plasmon resonance peak of the gold nanorods located near the excitation wavelength.

Localized surface plasmon resonance on Au nanoparticles: tuning and exploitation for performance enhancement in ultrathin photovoltaics

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 26216-26226 ◽  
Author(s):  
Vivek Garg ◽  
Brajendra S. Sengar ◽  
Vishnu Awasthi ◽  
Aaryashree Aaryashree ◽  
Pankaj Sharma ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Cross Section ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Au Nanoparticles ◽  
Performance Enhancement ◽  
Fine Tuning ◽  
Localized Surface Plasmon ◽  
Absorption Cross

We report a detailed correlation analysis of the size, shape, and distribution of Au nanoparticles (NPs) on fine-tuning of localized surface plasmon resonance and optical absorption cross-section.

scholarly journals Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kyeong Rim Ryu ◽  
Geun Wan Kim ◽  
Ji Won Ha
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Total Internal Reflection ◽  
Internal Reflection ◽  
Detection Sensitivity ◽  
Localized Surface Plasmon ◽  
Aspect Ratios ◽  
Scattering Spectrum

AbstractPlasmonic gold nanoparticles are widely used in localized surface plasmon resonance (LSPR) sensing. When target molecules adsorb to the nanoparticles, they induce a shift in the LSPR scattering spectrum. In conventional LSPR sensing, this shift is monitored at the maximum of the LSPR scattering peak. Herein, we describe the sensitivity of detecting chemisorption of 1-alkanethiols with different chain lengths (1-butanethiol and 1-haxanethiol) on single gold nanorods (AuNRs) of fixed diameter (25 nm) and three different aspect ratios under a total internal reflection scattering microscope. For single AuNRs of all sizes, the inflection point (IF) at the long-wavelength side (or low-energy side) of the LSPR scattering peak showed higher detection sensitivity than the traditionally used peak maximum. The improved sensitivity can be ascribed to the shape change of the LSPR peak when the local refractive index is increased by chemisorption. Our results demonstrate the usefulness of tracking the curvature shapes by monitoring the homogeneous LSPR IF at the red side of the scattering spectrum of single AuNRs.

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