Effect of laser irradiation on (Cd,Hg)Te properties

Apollinariy Zaginey; Bohdan K. Kotlyarchuk; Volodymyr G. Savitsky; V. Pisarevsky

doi:10.1117/12.344753

8 April 1999 Effect of laser irradiation on (Cd,Hg)Te properties

Apollinariy Zaginey, Bohdan K. Kotlyarchuk, Volodymyr G. Savitsky, V. Pisarevsky

Proceedings Volume 3725, International Conference on Solid State Crystals '98: Epilayers and Heterostructures in Optoelectronics and Semiconductor Technology; (1999) https://doi.org/10.1117/12.344753
Event: International Conference on Solid State Crystals '98, 1998, Zakopane, Poland

Abstract

Experimental investigations of (Cd,Hg)Te have been performed with the use of ns- and ms-duration pulses of solid state laser. Changes in the chemical composition of the irradiated surface have been analyzed by means of X-ray photoelectron and Auger electron spectroscopies. Single crystalline HgTe and (Cd,Hg)Te wafers and epitaxial films have been used as the experimental samples. Processes of integral evaporation with generation of a molten zone with thickness up to several micrometers dominate upon ns-pulses irradiation and crystallization follows autoepitaxy laws. There was not observed increase of linear defects density in the layer near surface. Inverse layer depth in n-(Cd,Hg)Te coincides with molten zone. In the case of ms-pulses the influenced zone is several tenth micrometers thick. Irradiation of the samples at T equals 500 - 600 K in saturated Hg vapor completely suppresses the change of the surface composition. Heating of (Cd,Hg)Te sample leads to generation of a great number of acceptor-type native defects. As a results p-n junctions are formed in n-(Cd,Hg)Te by pulsed laser irradiation.

Citation Download Citation

Apollinariy Zaginey, Bohdan K. Kotlyarchuk, Volodymyr G. Savitsky, and V. Pisarevsky "Effect of laser irradiation on (Cd,Hg)Te properties", Proc. SPIE 3725, International Conference on Solid State Crystals '98: Epilayers and Heterostructures in Optoelectronics and Semiconductor Technology, (8 April 1999); https://doi.org/10.1117/12.344753

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KEYWORDS

Crystals

Laser irradiation

Mercury

Surface finishing

Laser therapeutics

X-rays

Laser crystals

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