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Type: Artigo de periódico
Title: Perturbation Theory For The Wave Equation And The 'effective Refractive Index' Approach.
Author: Frateschi Newton C.
De Castro A.Rubens B.
Abstract: An Au and Aharonov type perturbation theory for the two-dimensional scalar wave equation is described. As an application, it is shown that the 'effective refractive index' method is related to the first-order correction to the eigenstate. In addition, the authors compare results obtained for the gain G in a typical laser structure using either the present theory or averaging the imaginary part of the refractive index over the fields ('average modal gain' G OVER BAR ). The results agree to about 8% in a test case where the perturbative result is, in fact, exact. It is concluded that the perturbative approach will, in general, be more reliable.
Rights: fechado
Identifier DOI: 
Date Issue: 1986
Appears in Collections:Unicamp - Artigos e Outros Documentos

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