title: Evaluation of two-photon nonlinearity by a semiclassical method.
abstract: In order to discuss the two-photon nonlinearity theoretically, both photons and nonlinear materials should be treated quantum mechanically, which usually is a heavy theoretical task. Contrarily, nonlinear optics for classical light has been developed well and a detailed analysis is possible for realistic complex nonlinear systems. Here we show that the two-photon nonlinearity can be evaluated from the linear and third-order nonlinear output fields against a classical input pulse, which contains 2(-1/2) photons on average.
authors.affiliation: CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Koshino
authors.forename: Hajime
authors.initials: H
authors.lastname: Ishihara