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Proceedings Paper

Relation between N2 and two-photon absorption
Author(s): M. Sheik-Bahae
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Paper 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.

Paper Details

Date Published: 1 November 1990
PDF: 7 pages
Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 14381L (1 November 1990); doi: 10.1117/12.2294466
Show Author Affiliations
M. Sheik-Bahae, CREOL, Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 1438:
Laser-Induced Damage in Optical Materials 1989
Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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