Title :
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
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;
Conference_Titel :
Day on Diffraction 2001. Proceedings. International Seminar
Conference_Location :
St.Petersburg
Print_ISBN :
5-7997-0366-9
DOI :
10.1109/DD.2001.988461
