期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 95, 期 2, 页码 345-350出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00340-009-3413-3
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We propose a physical understanding of scattering by subwavelength grooves surrounding a single perfect conductor slit based on the superposition of a cylindrical traveling surface wave and a standing surface wave. The collective reflection coefficient was introduced to handle the multi-interaction of the surface wave between subwavelength grooves, and a slit-grooves focusing structure was designed to demonstrate its validity. In comparison to numerical simulations by the finite difference time domain method, the proposed method proves effective in describing the multi-interaction behavior of a surface wave and in further refining the phase perturbation at the grooves' exits.
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