Optical diagnostics of laser-induced melting and defect formation at the surface of cadmium telluride

Leonid A. Golovan; Viktor Yu. Timoshenko

doi:10.1117/12.242139

10 June 1996 Optical diagnostics of laser-induced melting and defect formation at the surface of cadmium telluride

Leonid A. Golovan, Viktor Yu. Timoshenko

Proceedings Volume 2801, Nonlinear Optics of Low-Dimensional Structures and New Materials; (1996) https://doi.org/10.1117/12.242139
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

Modifications of structural, electrical and recombinational properties of CdTe under nanosecond pulse of ruby laser were studied by techniques of second harmonic generation, time resolved reflectivity, photoreflectance and photoluminescence. The threshold energy density necessary for surface melting W_m equals 40 +/- 5 mJ/cm² was determined. Changes in linear reflection coefficient indicate intensive evaporation of the components at W > 90 mJ/cm². Laser induced defect formation was registered after treatment with W > W_m. Apart from defect formation, the process of their annealing was detected in narrow area of energy near the melting threshold.

Citation Download Citation

Leonid A. Golovan and Viktor Yu. Timoshenko "Optical diagnostics of laser-induced melting and defect formation at the surface of cadmium telluride", Proc. SPIE 2801, Nonlinear Optics of Low-Dimensional Structures and New Materials, (10 June 1996); https://doi.org/10.1117/12.242139

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