Semiconductor Physics, Quantum Electronics & Optoelectronics, 28 (4), P. 432–440 (2025).
DOI: https://doi.org/10.15407/spqeo28.04.432
Thermodynamic and kinetic processes of modifying cadmium telluride-based heterosystems initiated by nanosecond intense laser radiation
S.M. Levytskyi
V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, Kyiv, Ukraine
*Corresponding author e-mail: levytskyism@gmail.com
Abstract. The paper considers the mechanisms of mass transfer in an In/CdTe system under nanosecond pulsed laser irradiation, which are caused by nonstationarity, nonequilibrium, physical and geometric nonlinearity, high rate and simultaneity of various physical processes. Moreover, threshold processes such as phase transitions and ablation in the metal/CdTe heterosystem, under powerful nanosecond laser irradiation at normal conditions and in a liquid medium are analyzed. The melting and ablation thresholds under nanosecond laser irradiation of the metal (In)/CdTe film structures in water are found and their change due to appearance of nonlinearities (caused by changes in the physical characteristics of In) and pressure generation is studied. It is found out that the pressure in the energy release region under irradiation of the In/CdTe with a neodymium laser (pulse = 7 ns) in water is 17 times greater in the case of the photothermoacoustic effect and 90 times greater in the case of indium melting.
Keywords: CdTe, In/CdTe, pulsed laser irradiation, photothermoacoustic effect, doping, melting.
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