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30 May 2022 High-temperature superfluorescence in hybrid Perovskites
Franky So, Kenan Gundogdu
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Proceedings Volume PC12149, Organic Electronics and Photonics: Fundamentals and Devices III; PC121490Z (2022) https://doi.org/10.1117/12.2631499
Event: SPIE Photonics Europe, 2022, Strasbourg, France
Abstract
Superfluorescence is a quantum phenomenon in which an ensemble of photoexcited dipoles are spontaneously synchronized leading to the formation of a macroscopic quantum coherence phase, forming a giant dipole and emitting a huge photon burst. Similar to other second order quantum phase transitions such as Bose-Einstein condensation and superconductivity, superfluorescence also requires the formation of a macroscopic coherence of the photoexcited quantum oscillators. The key to reach this macroscopic coherent quantum state is its phase stability and the synchronization time. Typically, due to phonon scattering, superfluorescence in solids can only occur at extremely low temperatures. In this presentation, we will present results of our recent discovery of high temperature superfluorescence in hybrid perovskites. Here, we report superfluorescence in hybrid perovskites at temperatures beyond 78 K, which is significantly higher than SF phase transition temperatures reported in other solids. Based on our analysis, we propose a model describing how the quantum phase is protected in hybrid perovskites and explain why high temperature superfluorescence can be observed in this unique material system. Specifically, using our model, we will explain how the synchronization time and the quantum phase stability are affected by the material composition and temperature. We postulate that our model can be used to explain other quantum phenomena as well.
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Franky So and Kenan Gundogdu "High-temperature superfluorescence in hybrid Perovskites", Proc. SPIE PC12149, Organic Electronics and Photonics: Fundamentals and Devices III, PC121490Z (30 May 2022); https://doi.org/10.1117/12.2631499
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KEYWORDS
Perovskite
Solid modeling
Solids
Oscillators
Phonons
Quantum wells
Scattering
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