Nonlinear absorption and refraction in CuCl at 532 nm
Abbreviated Journal Title
J. Opt. Soc. Am. B-Opt. Phys.
Z-SCAN MEASUREMENTS; 2-PHOTON ABSORPTION; ZINCBLENDE SEMICONDUCTORS; OPTICAL NONLINEARITIES; SINGLE-BEAM; ANISOTROPY; GAAS; CDTE; Optics
We report two-photon absorption in CuCl and its polarization dependence to give all three chi((3)) tensor elements at 532 nm. We also report bound electronic n(2) and free-carrier refraction in CuCl. The values obtained are each approximately one half the corresponding values for ZnSe. Previously, with ZnSe, the large two-photon absorption(2PA) and negative bound-electronic nonlinear refraction were combined with defocusing from 2PA-generated free carriers to provide effective optical limiting for visible picosecond input pulses. For nanosecond pulses thermal refraction is a problem because it leads to self focusing, and thus damage in ZnSe and most other semiconductors studied. However, the thermal refraction in CuCl is reported to be self-defocusing. Thus one might expect the self-protection properties of CuCl to be better than those of ZnSe for optical-limiting applications for nanosecond input pulses. (C) 1997 Optical Society of America.
Journal of the Optical Society of America B-Optical Physics
"Nonlinear absorption and refraction in CuCl at 532 nm" (1997). Faculty Bibliography 1990s. 2085.