STP1117

    Relation Between n2 and Two-Photon Absorption

    Published: Jan 1990


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    Abstract

    We present evidence from nonlinear refractive index measurements, two-photon absorption measurements, and fourwave 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.

    Keywords:

    nonlinear refraction, two-photon absorption, Kramers-Kronig, four-wave mixing, semiconductors


    Author Information:

    Sheik-Bahae, M
    University of Central Florida, Orlando, FL

    Hagan, DJ
    University of Central Florida, Orlando, FL

    Van Stryland, EW
    University of Central Florida, Orlando, FL

    Wei, TH
    University of Central Florida, Orlando, FL

    Said, AA
    University of Central Florida, Orlando, FL

    Canto, E
    University of Central Florida, Orlando, FL

    Miller, A
    University of Central Florida, Orlando, FL


    Paper ID: STP26525S

    Committee/Subcommittee: E13.15

    DOI: 10.1520/STP26525S


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