Directional light beaming control by a subwavelength asymmetric surface structure

Ding Zheng Lin, Tsung Dar Cheng, Chin Kai Chang, Jyi Tyan Yeh, Jonq Min Liu, Chau Shioung Yeh, Chih Kung Lee

研究成果: Article同行評審

35 引文 斯高帕斯(Scopus)

摘要

We propose a direct experimental set-up to observe the directional beaming effect of surface plasmon. A single diffracted beam from an asymmetric-sided surface corrugation is demonstrated. A single subwavelength slit with an asymmetric structure was fabricated using a focused ion beam (FIB) onto a metal surface with a glass substrate. By means of surface plasmon (SP) diffraction, the directionality of the light can be changed by the period of the metallic gratings. We show corresponding numerical simulations achieved by a Rigorous Coupled-Wave Analysis (RCWA) method and a Finite-Difference Time-Domain (FDTD) method. The simulation results were in agreement with the experimental data.

原文English
頁(從 - 到)2585-2591
頁數7
期刊Optics Express
15
發行號5
DOIs
出版狀態Published - 2007 三月 5

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學

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