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Size dependence of second-order hyperpolarizability of finite periodic chains under Su-Schrieffer-Heeger model

Abstract

The second hyperpolarizability γN(3ω;ω,ω,ω)\gamma_N(-3\omega;\omega,\omega,\omega) of N double-bond finite chain of trans-polyacetylene is analyzed using the Su-Schrieffer-Heeger model to explain qualitative features of the size dependence behavior of γN\gamma_N. Our study shows that γN/N\gamma_N/N is nonmonotonic with N and that the nonmonotonicity is caused by the dominant contribution of the intraband transition to γN\gamma_N in polyenes. Several important physical effects are discussed to reduce quantitative discrepancies between experimental and our results

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EDP Sciences OAI-PMH repository (1.2.0)

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Last time updated on 10/04/2020

This paper was published in EDP Sciences OAI-PMH repository (1.2.0).

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