Anomalies of metallic diffraction gratings
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چکیده
A detailed analysis of anomalies of metallic gratings is performed for a large interval of groove depths. Two types of zero of the zeroth diffraction order are distinguished: the Bragg type [Alta Freq. 38, 82 (1969)], exhibited in a Littrow mount for both TM and TE polarizations and localized for flat surfaces at negative imaginary infinity in the complex a plane of the sinus of angles of incidence, and a second type, connected with plasmon-polariton existence on a planar metal-air interface in TM polarization. The trajectories of these zeros are drawn in the a complex plane, revealing some new connections between them.
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تاریخ انتشار 2002