Micro-Raman mapping of surface changes induced by XUV laser radiation in cadmium telluride

0493487 - FZÚ 2019 RIV NL eng J - Journal Article
Vozda, Vojtěch - Burian, Tomáš - Chalupský, Jaromír - Dědič, V. - Hájková, Věra - Hlídek, P. - Juha, Libor - Kozlová, Michaela - Krůs, Miroslav - Kunc, J. - Rejhon, M. - Vyšín, Luděk - Rocca, J.J. - Franc, J.
Micro-Raman mapping of surface changes induced by XUV laser radiation in cadmium telluride.
Journal of Alloys and Compounds. Roč. 763, Sep (2018), s. 662-669. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR(CZ) GA17-05167s; GA MŠMT LTT17015; GA MŠMT EF15_008/0000162
Grant - others:ELI Beamlines(XE) CZ.02.1.01/0.0/0.0/15_008/0000162
Institutional support: RVO:68378271
Keywords : semiconductors * laser processing * crystal structure * impurities in semiconductors * atomic force microscopy * AFM * luminescence
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.175, year: 2018

A bulk sample of semi-insulating CdTe:In was exposed to single pulses of 21.2-nm radiation of Ne-like zinc plasma-based laser and 46.9-nm radiation of Ne-like argon capillary discharge laser. Irreversible changes induced by pure XUV laser radiation are studied and compared with action of continuous 532-nm high-power laser and IR pulses at 1320 nm. Modified surface is analyzed by optical and AF microscopy, micro-Raman imaging and low temperature photoluminescence. Noticeable amount of absorbed energy from the laser radiation is transferred into Te inclusions which are thermo-diffused and potentially evaporated from the surface layer surrounding the ablation imprint. Annealed CdTe lattice in these areas is detected via strong increase of Raman signal from longitudinal vibrations of the CdTe at 166 cm1. Low temperature photoluminescence measurements have shown that dislocations are generated in samples due to heating effects with IR radiation.
Permanent Link: http://hdl.handle.net/11104/0286853