Presentation
21 March 2023 Spontaneous and stimulated emission physics of aluminum nitride
Ryota Ishii, Toru Nagashima, Reo Yamamoto, Tatsuya Hitomi, Mitsuru Funato, Yoichi Kawakami
Author Affiliations +
Abstract
Spontaneous and stimulated emission spectroscopies were performed on transparent aluminum nitride (AlN) substrates grown by hydride vapor-phase epitaxy. The stimulated emission was observed from cryogenic to room temperatures and the origin was assigned by the spontaneous emission spectra and existing theories. AlN exhibited a purely excitonic stimulated emission at cryogenic temperatures, whereas the stimulated emission mechanism at room temperature originated from an exciton-electron scattering process. The temperature-induced and excitation-power-induced stimulated emission crossovers were found and interpreted in terms of the peculiar excitonic structure of AlN.
Conference Presentation
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Ryota Ishii, Toru Nagashima, Reo Yamamoto, Tatsuya Hitomi, Mitsuru Funato, and Yoichi Kawakami "Spontaneous and stimulated emission physics of aluminum nitride", Proc. SPIE PC12421, Gallium Nitride Materials and Devices XVIII, (21 March 2023); https://doi.org/10.1117/12.2647637
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KEYWORDS
Aluminum nitride

Physics

Crystals

Cryogenics

Emission spectroscopy

Epitaxy

Excimer lasers

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