Semiconductor Physics, Quantum Electronics & Optoelectronics, 26 (2), P. 201-207 (2023).
DOI: https://doi.org/10.15407/spqeo26.02.201

Laser-induced thermal emission of carbon microparticles on transparent heat-sink substrates

K.S. Zelenska1, S.E. Zelensky1*, O.S. Kolesnik1, Toru Aoki2, P.O. Teselko1

1Taras Shevchenko National University of Kyiv, Faculty of Physics
64/13, Volodymyrska str., 01601 Kyiv, Ukraine
2Research Institute of Electronics, Shizuoka University
Johoku 3-5-1, Naka-ku, Hamamatsu 432-8011, Japan
*Corresponding author e-mail: Zelensky@knu.ua


Abstract. Thermal emission is an informative tool to study materials’ properties at high temperatures under laser irradiation. The kinetics decay of laser-induced thermal emission from carbon microparticles deposited on heat-sink surfaces of transparent dielectrics (glass and sapphire) was studied. A Q-switched YAG:Nd3+ laser (pulse duration τi = 20 ns, energy/power density 0.5 J·cm–2, 25 MW·cm–2) was employed to excite thermal emission. In calculations, the classical heat conduction equation was used. With increasing the thermal conductivity of substrate (from glass to sapphire), reduction in the emission pulse duration has been observed.

Keywords:laser-induced thermal emission, carbon microparticles, heat-sink substrate.

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