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13 March 2024 Toward semiconductor laser cooling using halide perovskite nanocrystals
Yang Ding, Zhuoming Zhang, Sushrut Ghonge, Shubin Zhang, Masaru Kuno
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Proceedings Volume PC12902, Photonic Heat Engines: Science and Applications VI; PC1290209 (2024) https://doi.org/10.1117/12.3000243
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Lead-halide perovskite nanocrystals are promising candidates for semiconductor laser cooling due to their near-unity photoluminescence quantum yields and efficient photon/phonon up-conversion process. This unexpected, efficient sub-gap energy up-conversion implies an unexpectedly strong electron-phonon interaction in perovskite nanocrystals. However, the underlying mechanism remains mostly unclear. Detailed experiments, along with theory, have now been conducted to elucidate the efficient up-conversion in CsPbBr3 NCs, utilizing a combination of techniques: photothermal absorption spectroscopy, up-conversion detuning spectroscopy, and ultrafast transient differential absorption spectroscopy.
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Yang Ding, Zhuoming Zhang, Sushrut Ghonge, Shubin Zhang, and Masaru Kuno "Toward semiconductor laser cooling using halide perovskite nanocrystals", Proc. SPIE PC12902, Photonic Heat Engines: Science and Applications VI, PC1290209 (13 March 2024); https://doi.org/10.1117/12.3000243
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KEYWORDS
Nanocrystals
Absorption spectroscopy
Perovskite
Quantum efficiency
Quantum optics experiments
Quantum physics
Quantum processes
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