Proceedings of the Optical Society of Korea Conference (한국광학회:학술대회논문집)
- 2007.07a
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- Pages.255-256
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- 2007
Beam focusing by a single subwavelength metal slit surrounded by chirped dielectric surface gratings
금속 슬릿 주변에 유전체 chirped grating을 배열함으로써 구현한 beam focusing
Abstract
We propose a novel method for the beam focusing by a single subwavelength metal slit surrounded by chirped dielectric surface gratings. In the proposed method, the period of each grating is chirped to make a focused beam at the desired position. Design of the grating structures for optimal beam focusing and the analysis of the field distribution are conducted based on the rigorous coupled wave analysis (RCWA). It is shown that the focused beam is formed at 1.5
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