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Kvantovaya Elektronika, 2022 Volume 52, Number 4, Pages 382–385 (Mi qe18018)

This article is cited in 1 paper

Interaction of laser radiation with matter

Broadband emission from polycrystalline graphite

S.Sh. Rekhviashvilia, D. S. Gaevb, Z. Ch. Margushevc

a Institute of Applied Mathematics and Automation, Kabardino-Balkarian Scientific Center, Russian Academy of Sciences, Nalchik, Kabardino-Balkarian Republic, Russia
b Berbekov Kabardino-Balkarian State University, Nalchik
c Institute of Informatics and Problems of Regional Management, Kabardino-Balkarian Scientific Center, Russian Academy of Sciences, Nalchik, Kabardino-Balkarian Republic, Russia

Abstract: Visible radiation spectra of polycrystalline graphite under electrical and laser excitation is studied. It is shown that two different mechanisms of photon emission with a broadband spectrum are implemented in this material. The radiation arising as a result of resistive heating is thermal radiation, whose parameters are close to those of blackbody radiation. The laser-induced secondary radiation in the visible range is anti-Stokes luminescence. A red shift of the laser-induced radiation from fine-grained graphite with respect to the similar spectrum of a bulk sample is observed.

Keywords: polycrystalline graphite, broadband emission, thermal radiation, anti-Stokes luminescence, stimulated Raman scattering.

Received: 07.09.2021
Revised: 17.11.2021
Accepted: 17.11.2021


 English version:
Quantum Electronics, 2022, 52:4, 382–385

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© Steklov Math. Inst. of RAS, 2025