Numerical investigation of trapped modes in an irregular waveguide

A. V. Tikhonov

Faculty of Physics, Moscow State University, GSP-2, Leninskie gory, Moscow, 119992, Russia

Abstract: It is shown by means of a numerical experiment that an arbitrary asymmetric perturbation of the function describing a dielectric insert in a waveguide, in the general case, results in vanishing of the trapped mode; i.e., it ceases to exist.

Key words: waveguides, eigenvalues, trapped modes.

UDC: 519.634

Received: 03.05.2005

 English version: Computational Mathematics and Mathematical Physics, 2006, 46:3, 481–488

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