Modification of band gap in surface layer in Cd1-xZnxTe by YAG: Nd+3 laser radiation

Artur Medvid; Leonid L. Fedorenko; Dmytro V. Korbutjak; Sergiy G. Kryluk; Mikola M. Yusupov; Aleksandr Mychko

doi:10.1117/12.726500

25 January 2007 Modification of band gap in surface layer in Cd_1-xZn_xTe by YAG:Nd⁺³ laser radiation

Artur Medvid, Leonid L. Fedorenko, Dmytro V. Korbutjak, Sergiy G. Kryluk, Mikola M. Yusupov, Aleksandr Mychko

Proceedings Volume 6596, Advanced Optical Materials, Technologies, and Devices; 65961A (2007) https://doi.org/10.1117/12.726500
Event: Advanced Optical Materials, Technologies, and Devices, 2006, Vilnius, Lithuania

Abstract

A mechanism of formation of graded band-gap based on Thermogradient Effect (TGE) is proposed in Cd_1-xZn_xTe at irradiation by second harmonic of a Q-switched YAG:Nd laser. According to the effect, the interstitial atoms of Cd (Cd_i) in Cd_1-xZn_xTe move along the temperature gradient while the Cd vacancies (V_Cd) and Zn atoms - in the opposite direction, into the bulk of the semiconductor where temperature is lower. Photoluminescence (PL) spectra studied at 5 K show that concentration of Zn atoms increases due to aggregation of VCd with Zn after laser irradiation. Formation of a graded band-gap in Cd_1-xZn_xTe crystal at irradiation by second harmonica of YAG:Nd laser by is shown to be possible.

Citation Download Citation

Artur Medvid, Leonid L. Fedorenko, Dmytro V. Korbutjak, Sergiy G. Kryluk, Mikola M. Yusupov, and Aleksandr Mychko "Modification of band gap in surface layer in Cd_1-xZn_xTe by YAG:Nd⁺³ laser radiation", Proc. SPIE 6596, Advanced Optical Materials, Technologies, and Devices, 65961A (25 January 2007); https://doi.org/10.1117/12.726500

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