Fabrication of periodical structure and shape-induced modulating spectroscopy of Au nanoparticles

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• 作者：Gang Bi^a ; Wei Xiong^a ; Li Wang^b ; Kosei Ueno^c ; ^d ; Hiroaki Misawa^c ; Jian-rong Qiu^b ; ^{qjr@zju.edu.cn}
• 关键词：High-resolution electron beam lithography ; Periodical bowties structure ; Shape-induced modulating spectroscopy ; FDTD ; Surface plasmon
• 刊名：Optics Communications
• 出版年：2012
• 期刊代码：50_00304018
• 类别：ph
• 出版时间：1 May, 2012
• 卷：285
• 期：9
• 页码：2472-2477
• 文件大小：1304 K

摘要

This paper presents optical property of the periodical bowties structure of Au nanoparticles on glass substrate fabricated by high-resolution electron beam lithography. Numerical calculation is used to examine the shape-induced surface plasmon enhancement and extinction spectroscopy by using Finite-Difference Time Domain algorithm and Lorentz model of surface plasmon. The calculated extinction spectra of the periodical nanoparticles are consistent with the experimental results. The influence of the geometrical shape on the spectral properties of bowtie nanoparticles is discussed. This investigation may help one to design plasmonic sub-wavelength devices with desired spectral properties.