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10 March 2020 Thermal free ultrafast luminescence due to nonlocal light-matter interaction (Conference Presentation)
Masayoshi Ichimiya, Takuya Matsuda, Hajime Ishihara, Masaaki Ashida
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Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 112780U (2020) https://doi.org/10.1117/12.2544760
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
We demonstrate ultrafast superradiance showing 10-fs decay due to the nonlocal interaction between light waves and exciton waves in CuCl mesoscopic thin films. This time constant is comparable with the thermal dephasing even at room temperature. Actually, we observed photoluminescence signal from one confined mode of translational motion of the exciton surviving at room temperature. In addition, temperature dependence of the photoluminescence spectra with multiple peaks was reproduced well by theoretical calculation. This finding opens a new avenue of “thermal free photonics”, where the exciton coherence is utilized at higher temperature.
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Masayoshi Ichimiya, Takuya Matsuda, Hajime Ishihara, and Masaaki Ashida "Thermal free ultrafast luminescence due to nonlocal light-matter interaction (Conference Presentation)", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780U (10 March 2020); https://doi.org/10.1117/12.2544760
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KEYWORDS
Ultrafast phenomena
Luminescence
Light-matter interactions
Thin films
Excitons
Phonons
Scattering
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