Optimizing bowtie structure parameters for specific incident light
作者： Qiao Wang , Shi-Fa Wu , Xu-Feng Li , Xiao-Gang Wang
DOI: 10.1088/1674-1056/19/11/117304
关键词:
摘要: We investigate optical properties of a bowtie-shaped aperture using the finite difference time domain method to optimize its geometric parameters for specific incident lights. The influence on local field enhancement and resonant wavelength in visible frequency range is numerically analysed. It found that major resonance spectrum exponentially depended bowtie angle but independent whole size. simulation also demonstrates increasing size raises intensity exit plane due an enlarged interaction area between light metal medium. And near-field spot closely related gap. Based these results, design rules structure can be optimized wavelengths excited.
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