Nondegenerate two-photon absorption in CdS

Gary R. Allan; Edesly J. Canto-Said; Eric C. Fox; Henry M. van Driel

doi:10.1117/12.137680

21 October 1992 Nondegenerate two-photon absorption in CdS

Gary R. Allan, Edesly J. Canto-Said, Eric C. Fox, Henry M. van Driel

Proceedings Volume 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors; (1992) https://doi.org/10.1117/12.137680
Event: Semiconductors '92, 1992, Somerset, NJ, United States

Abstract

A femtosecond continuum, with a bandwidth of 90 nm, has been used in a pump-probe geometry to investigate nondegenerate two-photon absorption (2 PA) from 660 nm to 570 nm, with pump wavelength (lambda) equals 620 nm, in hexagonal CdS at 300 K. A dependence upon probe wavelength and relative beam polarization is observed. The polarization anisotropy has allowed us to measure the relative magnitudes of particular (chi) ⁽³) tensor elements. The nondegenerate 2 PA coefficient increases by a factor of about two from 660 nm to 570 nm. The anisotropy and dispersion are discussed in terms of a two-parabolic-band model.

Citation Download Citation

Gary R. Allan, Edesly J. Canto-Said, Eric C. Fox, and Henry M. van Driel "Nondegenerate two-photon absorption in CdS", Proc. SPIE 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors, (21 October 1992); https://doi.org/10.1117/12.137680

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