Subwavelength focusing in the near field in mesoscale air-dielectric structures

Pei Kuen Wei*, Hsieh Li Chou, Yi-Chun Chen

*此作品的通信作者

研究成果: Article同行評審

20 引文 斯高帕斯(Scopus)

摘要

Subwavelength focusing in mesoscale structures was measured in the near field. Specifically, we found that plane waves form focused beams in higher topographic regions when they propagate through mesoscale transparent air-dielectric structures. By finite-difference time-domain simulations we verified that light diffracted off topographic edges and its convergence at higher topographic regions are the mechanisms for focus. This subwavelength focusing effect provides a simple way for mass production of mesoscale periodic structures. We made subwavelength gratings and hole arrays to demonstrate their feasibility.

原文English
頁(從 - 到)433-435
頁數3
期刊Optics Letters
29
發行號5
DOIs
出版狀態Published - 1 3月 2004

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