Simulation of lead selenide film heating by CW laser radiation taking into considering oxidation process DOI Open Access
Maksim Sergeev, A. E. Pushkareva,

Victoria Hassan

et al.

Scientific and technical journal of information technologies mechanics and optics, Journal Year: 2025, Volume and Issue: 25(2), P. 190 - 198

Published: April 24, 2025

The heating characteristics of a lead selenide (PbSe) film under continuous laser radiation were investigated, accounting for the nucleation and increase in thickness an oxide phase layer. It is shown that oxidation PbSe reduces rate lowers maximum temperature due to decrease fraction absorbed within phase. modeling results presented this work substantiate earlier experimental findings. For first time, explanation mechanism enabled determining most effective exposure duration form structures with specified optical characteristics. study was conducted using analytical modeling. A particular solution heat conduction equation employed describe source. properties characterized Fresnel equations light reflection transmission. Based on previously obtained data, model developed source film, considering changes its formation layer increasing thickness. findings show that, when exposed wavelength 405 nm, extinction coefficient kf, decreases from 0.488 1.62∙10–3 In case, refractive index nf, similarly 3.532 1.925. absorption at 0.68 0.03 during irradiation. As increases 0 600 growth irradiated zone slows down, shifts surface toward film-substrate interface. When power density about 340 W/cm 2 9 s, does not exceed 275 °C. can be applied development mid-infrared spectrum photo detectors based film. Laser annealing allows local controlled electrical narrow range values, thereby influencing sensitivity used as detector midand far-infrared radiation.

Language: Английский

Simulation of lead selenide film heating by CW laser radiation taking into considering oxidation process DOI Open Access
Maksim Sergeev, A. E. Pushkareva,

Victoria Hassan

et al.

Scientific and technical journal of information technologies mechanics and optics, Journal Year: 2025, Volume and Issue: 25(2), P. 190 - 198

Published: April 24, 2025

The heating characteristics of a lead selenide (PbSe) film under continuous laser radiation were investigated, accounting for the nucleation and increase in thickness an oxide phase layer. It is shown that oxidation PbSe reduces rate lowers maximum temperature due to decrease fraction absorbed within phase. modeling results presented this work substantiate earlier experimental findings. For first time, explanation mechanism enabled determining most effective exposure duration form structures with specified optical characteristics. study was conducted using analytical modeling. A particular solution heat conduction equation employed describe source. properties characterized Fresnel equations light reflection transmission. Based on previously obtained data, model developed source film, considering changes its formation layer increasing thickness. findings show that, when exposed wavelength 405 nm, extinction coefficient kf, decreases from 0.488 1.62∙10–3 In case, refractive index nf, similarly 3.532 1.925. absorption at 0.68 0.03 during irradiation. As increases 0 600 growth irradiated zone slows down, shifts surface toward film-substrate interface. When power density about 340 W/cm 2 9 s, does not exceed 275 °C. can be applied development mid-infrared spectrum photo detectors based film. Laser annealing allows local controlled electrical narrow range values, thereby influencing sensitivity used as detector midand far-infrared radiation.

Language: Английский

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