Статья

Measuring plasmon-resonance enhanced third-harmonic χ(3) of Ag nanoparticles

Tzu‐Ming LiuNational Taiwan University Department of Electrical Engineering, , Taipei 10617, Taiwan, Republic of China and Graduate Institute of Electro-Optical Engineering, , Taipei 10617, Taiwan, Republic of ChinaShih-Peng TaiNational Taiwan University Department of Electrical Engineering, , Taipei 10617, Taiwan, Republic of China and Graduate Institute of Electro-Optical Engineering, , Taipei 10617, Taiwan, Republic of ChinaChe‐Hang YuNational Taiwan University Department of Electrical Engineering, , Taipei 10617, Taiwan, Republic of China and Graduate Institute of Electro-Optical Engineering, , Taipei 10617, Taiwan, Republic of ChinaYu‐Chieh WenNational Taiwan University Department of Electrical Engineering, , Taipei 10617, Taiwan, Republic of China and Graduate Institute of Electro-Optical Engineering, , Taipei 10617, Taiwan, Republic of ChinaShi‐Wei ChuNational Taiwan University Department of Electrical Engineering, , Taipei 10617, Taiwan, Republic of China and Graduate Institute of Electro-Optical Engineering, , Taipei 10617, Taiwan, Republic of ChinaLung-Jin ChenNational Chung Hsing University Department of Chemistry, , Taichung 40227, Taiwan, Republic of ChinaMuppa Ramakrishna PrasadNational Chung Hsing University Department of Chemistry, , Taichung 40227, Taiwan, Republic of ChinaKuan‐Jiuh LinNational Chung Hsing University Department of Chemistry, , Taichung 40227, Taiwan, Republic of ChinaChi‐Kuang SunNational Taiwan University Department of Electrical Engineering, , Taipei 10617, Taiwan, Republic of China and Graduate Institute of Electro-Optical Engineering, , Taipei 10617, Taiwan, Republic of China

2006en

ABI

Аннотация

By coinciding the plasmon frequency with the third-harmonic frequency of the excitation light, the authors determined the plasmon-resonance enhanced optical third-harmonic-generation (THG) susceptibility of a polyvinylpyrrolidone-coated Ag nanoparticle with a 5–7nm diameter. With dispersed Ag nanoparticles on a quartz surface and through measuring the frequency dependent THG intensities, interface THG showed evident enhancement when the third harmonic of excitation matched the Ag-nanoparticle’s plasmon-resonant frequency. According to the effective medium theory and by analyzing the interface THG under focused Gaussian beams, the ensemble-averaged χ(3)(3ω:ω,ω,ω) of a Ag nanoparticle can be estimated to be on the order of 2×10−11esu.

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Идентификаторы

DOI: 10.1063/1.2240738

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar