Modification of optical properties of ZnSe crystals by means of photothermal treatment

Yuri A. Zagoruiko

doi:10.1117/12.344381

7 April 1999 Modification of optical properties of ZnSe crystals by means of photothermal treatment

Yuri A. Zagoruiko

Proceedings Volume 3578, Laser-Induced Damage in Optical Materials: 1998; (1999) https://doi.org/10.1117/12.344381
Event: Laser-Induced Damage in Optical Materials: 1998, 1998, Boulder, CO, United States

Abstract

Thermal treatment of ZnSe crystals in a temperature gradient field allows to essentially improve their optical and electrical characteristics. Considered here is the possibility to modify the optical properties of real ZnSe single crystals in the process of photothermal treatment. Such a treatment comprises thermal annealing in a temperature gradient field and simultaneous irradiation of crystalline samples with white light. Investigations were performed on thin ZnSe discs or plates cut out of crystalline boules grown from the metal in graphite crucibles. The samples were annealed while being pulled through 60-70 K/cm temperature gradient field. In the process of annealing larger faces of the samples were irradiated with white light, illuminance reaching 5 10⁴ lx. The described treatment enables to reduce the coefficients of CO₂-laser radiation absorption and scattering in the samples, as well as to raise their laser damage threshold.

Citation Download Citation

Yuri A. Zagoruiko "Modification of optical properties of ZnSe crystals by means of photothermal treatment", Proc. SPIE 3578, Laser-Induced Damage in Optical Materials: 1998, (7 April 1999); https://doi.org/10.1117/12.344381

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