Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light

doi:10.1088/1674-1056/20/8/087805

中国物理B ›› 2011, Vol. 20 ›› Issue (8): 87805-087805.doi: 10.1088/1674-1056/20/8/087805

Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light

李婷, 于丽, 逯志欣, 宋钢, 张恺

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2010-11-03 修回日期:2011-05-05 出版日期:2011-08-15 发布日期:2011-08-15
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2010CB923202).

Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light

Li Ting(李婷)^a)b), Yu Li(于丽)^a)b)†, Lu Zhi-Xin(逯志欣)^a)b), Song Gang(宋钢)^a)b), and Zhang Kai(张恺)^a)b)

^aState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; ^b School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2010-11-03 Revised:2011-05-05 Online:2011-08-15 Published:2011-08-15
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2010CB923202).

摘要/Abstract

摘要： The effects of various parameters including thickness and dielectric constants of substrates, shapes of nanoparticles, and polarization direction of incident light, on the extinction spectra of periodic gold nanoparticle arrays are investigated by the full-vectorial three-dimensional (3D) finite difference time domain (FDTD) method. The calculated results show that the substrate affects the extinction spectra by coupling the fields co-excited by the substrate and gold nanoparticles. Extinction spectra are influenced by the shapes of the nanoparticles, but there are no obvious changes in extinction spectra for similar shapes. The polarization direction of incident light has a great influence on the extinction spectra. The implications of these results are discussed.

关键词: localized surface plasmon, extinction spectra, gold nanoparticles

Abstract: The effects of various parameters including thickness and dielectric constants of substrates, shapes of nanoparticles, and polarization direction of incident light, on the extinction spectra of periodic gold nanoparticle arrays are investigated by the full-vectorial three-dimensional (3D) finite difference time domain (FDTD) method. The calculated results show that the substrate affects the extinction spectra by coupling the fields co-excited by the substrate and gold nanoparticles. Extinction spectra are influenced by the shapes of the nanoparticles, but there are no obvious changes in extinction spectra for similar shapes. The polarization direction of incident light has a great influence on the extinction spectra. The implications of these results are discussed.

Key words: localized surface plasmon, extinction spectra, gold nanoparticles

中图分类号: (Nanocrystals, nanoparticles, and nanoclusters)

78.67.Bf

42.25.Bs (Wave propagation, transmission and absorption)

李婷, 于丽, 逯志欣, 宋钢, 张恺. Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light[J]. 中国物理B, 2011, 20(8): 87805-087805.

Li Ting(李婷), Yu Li(于丽), Lu Zhi-Xin(逯志欣), Song Gang(宋钢), and Zhang Kai(张恺) . Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light[J]. Chin. Phys. B, 2011, 20(8): 87805-087805.

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Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light

Controlling optical properties of periodic gold nanoparticle arrays by changing the substrate, topologic shapes of nanoparticles, and polarization direction of incident light

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