Calculations of nonlinear waves in multilayer waveguides applied to polyalkylthiophenes, including linear and two-photon absorption

Arja Heinämäki

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The TE waves in a weakly nonlinear multilayer waveguide structure are studied theoretically; linear and two-photon absorption are included in the analysis. The nonlinear material is taken to be a polyalkylthiophene. The Jacobian function model is extended to the complex plane to describe the electric field in an absorbing structure, and the results are compared with those of perturbation theory. Both the Jacobian model and perturbation theory are found to be applicable in this problem; the Jacobian model fails only for strong two-photon absorption. A figure of merit is defined to describe the capability of nonlinear operation in various optical components, and its behavior is studied. The need to reduce linear absorption remarkably and to avoid two-photon absorption is established.

Original languageEnglish
Pages (from-to)1254 - 1260
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Volume10
Issue number7
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

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waveguides
photons
perturbation theory
figure of merit
electric fields

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title = "Calculations of nonlinear waves in multilayer waveguides applied to polyalkylthiophenes, including linear and two-photon absorption",
abstract = "The TE waves in a weakly nonlinear multilayer waveguide structure are studied theoretically; linear and two-photon absorption are included in the analysis. The nonlinear material is taken to be a polyalkylthiophene. The Jacobian function model is extended to the complex plane to describe the electric field in an absorbing structure, and the results are compared with those of perturbation theory. Both the Jacobian model and perturbation theory are found to be applicable in this problem; the Jacobian model fails only for strong two-photon absorption. A figure of merit is defined to describe the capability of nonlinear operation in various optical components, and its behavior is studied. The need to reduce linear absorption remarkably and to avoid two-photon absorption is established.",
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Calculations of nonlinear waves in multilayer waveguides applied to polyalkylthiophenes, including linear and two-photon absorption. / Heinämäki, Arja.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 10, No. 7, 1993, p. 1254 - 1260.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Calculations of nonlinear waves in multilayer waveguides applied to polyalkylthiophenes, including linear and two-photon absorption

AU - Heinämäki, Arja

PY - 1993

Y1 - 1993

N2 - The TE waves in a weakly nonlinear multilayer waveguide structure are studied theoretically; linear and two-photon absorption are included in the analysis. The nonlinear material is taken to be a polyalkylthiophene. The Jacobian function model is extended to the complex plane to describe the electric field in an absorbing structure, and the results are compared with those of perturbation theory. Both the Jacobian model and perturbation theory are found to be applicable in this problem; the Jacobian model fails only for strong two-photon absorption. A figure of merit is defined to describe the capability of nonlinear operation in various optical components, and its behavior is studied. The need to reduce linear absorption remarkably and to avoid two-photon absorption is established.

AB - The TE waves in a weakly nonlinear multilayer waveguide structure are studied theoretically; linear and two-photon absorption are included in the analysis. The nonlinear material is taken to be a polyalkylthiophene. The Jacobian function model is extended to the complex plane to describe the electric field in an absorbing structure, and the results are compared with those of perturbation theory. Both the Jacobian model and perturbation theory are found to be applicable in this problem; the Jacobian model fails only for strong two-photon absorption. A figure of merit is defined to describe the capability of nonlinear operation in various optical components, and its behavior is studied. The need to reduce linear absorption remarkably and to avoid two-photon absorption is established.

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DO - 10.1364/JOSAB.10.001254

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JO - Journal of the Optical Society of America B: Optical Physics

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