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Proceedings Paper

Nondegenerate two-photon absorption in CdS
Author(s): Gary R. Allan; Edesly J. Canto-Said; Eric C. Fox; Henry M. van Driel
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Paper 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.

Paper Details

Date Published: 21 October 1992
PDF: 6 pages
Proc. SPIE 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors, (21 October 1992); doi: 10.1117/12.137680
Show Author Affiliations
Gary R. Allan, Univ. of Toronto (Canada)
Edesly J. Canto-Said, Univ. of Toronto (Canada)
Eric C. Fox, Univ. of Toronto (Canada)
Henry M. van Driel, Univ. of Toronto (Canada)


Published in SPIE Proceedings Vol. 1677:
Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors

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