Numerical detection of surface waves in diffraction gratings

Author

Grikurov, Valery E. ; Heikkola, Erkki ; Neittaanmäki, Pekka ; Plamenevskii, Boris A.

Author_Institution

Dept. of Math. Phys., St. Petersburg Univ., Russia

fYear

2001

fDate

2001

Firstpage

97

Lastpage

106

Abstract

A new approach to detect surface waves in diffraction gratings is suggested. The approach is based on a general existence criterion which is formulated in terms of a so-called augmented scattering matrix (ASM). To construct such (unitary) matrices one has to take into account not only oscillating modes but also those which exponentially grow (attenuate) in amplitude away from the grating. The method of numerical computation of ASM uses some optimization procedure to identify the coefficients in the asymptotics of such modes. We give some examples of surface waves in gratings

Keywords

S-matrix theory; diffraction gratings; electromagnetic wave diffraction; electromagnetic wave scattering; matrix algebra; optimisation; surface electromagnetic waves; Rayleigh-Bloch surface waves; augmented scattering matrix; coefficients; diffraction gratings; numerical detection; optimization; oscillating modes; surface waves; unitary matrices; Diffraction gratings; Frequency; H infinity control; Information technology; Optimization methods; Physical layer; Physics; Rayleigh scattering; Surface waves; Transmission line matrix methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Day on Diffraction 2001. Proceedings. International Seminar

Conference_Location

St.Petersburg

Print_ISBN

5-7997-0366-9

Type

conf

DOI

10.1109/DD.2001.988461

Filename

988461