Wavelength and Polarization Dependence of Second-Harmonic Responses from Gold Nanocrescent Arrays
Wavelength and Polarization Dependence of Second-Harmonic Responses from Gold Nanocrescent Arrays
复制标题
金纳米月牙阵列二次谐波响应的波长和偏振依赖性
DOI：
10.1021/acs.jpcc.0c05548
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Ge, Nien-Hui
中科院分区：
文献类型：
--
作者：
Maekawa, Hiroaki;Drobnyh, Elena;Lancaster, Cady A.;Large, Nicolas;Schatz, George C.;Shumaker-Parry, Jennifer S.;Sukharev, Maxim;Ge, Nien-Hui
在非线性等离子体领域的发展中，理解金属纳米结构的局域表面等离子体共振（LSPR）性质与其非线性光学响应之间的基本关系是非常重要的。详细了解具有良好表征的LSPR的纳米结构的非线性响应是未来设计具有先进功能的复杂等离子体系统来控制光的必要前提。在本文中，我们研究了金纳米新月（Au NC）天线的二阶谐波（SH）响应，该天线在可见光和近红外波长范围内具有波长和偏振敏感的LSPRs。SH强度的波长依赖性表现出与吸收光谱中的偶极LSPR带不同的光谱轮廓。入射偏振角的依赖性被发现显着变化时，激发波长被调谐在偶极带。采用时域有限差分法结合非线性流体动力学模型对Au NC阵列进行了计算，研究了入射基波光和发射SH光的局域场增强。实验和理论结果表明，高阶LSPR，如四极和多极共振，发生在SH波长的影响是重要的，在管理SH生成过程。此外，它表明，SH信号的入射偏振角的依赖性是非常强烈的纳米级的NC的形状的变化敏感。
In the developing field of nonlinear plasmonics, it is important to understand the fundamental relationship between properties of the localized surface plasmon resonance (LSPR) of metallic nanostructures and their nonlinear optical responses. A detailed understanding of nonlinear responses from nanostructures with well-characterized LSPRs is an essential prerequisite for the future design of sophisticated plasmonic systems with advanced functions to control light. In this article, we investigate the second-order harmonic (SH) responses from gold nanocrescent (Au NC) antennas which have wavelength and polarization sensitive LSPRs in the visible and near-infrared wavelength ranges. The wavelength dependence of the SH intensity exhibits spectral profiles different from dipole LSPR bands in absorbance spectra. The incident polarization angle dependence was found to vary significantly when the excitation wavelength was tuned over the dipole band. Finite-difference time-domain calculations coupled with a nonlinear hydrodynamic model were carried out for Au NC arrays to investigate the local field enhancement of the incoming fundamental and emitting SH light. The experimental and theoretical results indicate that the effects of higher-order LSPRs, such as quadrupole and multipole resonances, occurring at SH wavelengths are important in governing the SH generation process. Also, it is shown that the incident polarization angle dependence of SH signals is very strongly sensitive to nanoscale variations in the NC’s shape.
登录
查看更多内容
影响因子：
2.8
作者：
Jérôme Nappa;I. Russier-Antoine;E. Benichou;C. Jonin;P. Brevet
通讯作者：
Jérôme Nappa;I. Russier-Antoine;E. Benichou;C. Jonin;P. Brevet
影响因子：
24.2
作者：
Bin Hasan, Shakeeb;Lederer, Falk;Rockstuhl, Carsten
通讯作者：
Rockstuhl, Carsten
超快和非线性等离子体激元动力学
影响因子：
8.6
作者：
T. Shahbazyan;M. Stockman;M. Raschke;S. Berweger;J. Atkin
通讯作者：
J. Atkin
金新月形和逗号状纳米结构中的二次谐波产生。
影响因子：
3.6
作者：
I. Kolmychek;E. Mamonov;V. Bochenkov;T. Murzina
通讯作者：
T. Murzina
影响因子：
3.7
作者：
Nappa, J;Revillod, G;Brevet, PF
通讯作者：
Brevet, PF