期刊
PHYSICAL REVIEW A
卷 95, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.95.053843
关键词
-
资金
- Advanced Research Foundation [7/004/2013-2018]
Angular spectra of reflectance of light from one-dimensional periodic gratings of V-shaped grooves in a metal film have been theoretically studied at a fixed wavelength. The exciting light wave was incident in the plane parallel to grooves. For the case of s-polarized incident wave there are two types of features (dips) in reflection spectra. The first type is associated with the excitation of channel plasmons in every single groove of a grating. Angular positions of features of the second type are determined by a period of a grating. We have shown that the features of the second type are Wood anomalies associated with the excitation of surface waves on a metal film by means of diffraction of the incident wave on a periodic grating. For certain periods of a grating and angles of incidence of the exciting wave the resonances of two types can be coupled.
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