Title

Relation Between N2 And Two-Photon Absorption

Keywords

Four-Wave Mixing; Kramers-Kronig; Nonlinear Refraction; Semiconductors; Two-Photon Absorption

Abstract

We present evidence from nonlinear refractive index measurements, two-photon absorption measurements, and four-wave mixing measurements on semiconductors showing that the bound electronic nonlinearity can be calculated from two-photon absorption dispersion via a simple Kramers-Kronig analysis. This analysis shows n2 changing from positive to negative as the photon energy approaches the band-gap energy, consistent with observations. Additionally, this simple calculation, which assumes two parabolic bands, gives good agreement with measured values of n2 in wide-gap dielectrics that are 2 to 3 orders of magnitude smaller than in semiconductors.

Publication Date

11-1-1990

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

1438

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2294466

Socpus ID

85075522151 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85075522151

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