We study amplified spontaneous emission (ASE) in MAPbBr₃ planar waveguides using femtosecond spectroscopy. We show that ASE happens without optical gain, and involves exciton-polaritons at low excitations and new hybrid states at high excitations.
Amplified Spontaneous Emission without Photon Gain in MAPbBr3 Planar Waveguides
Simbula, Angelica
Primo
;Pitzalis, Federico;Pau, Riccardo;Cadeddu, Emanuele D.;Wu, Luyan;Lai, Stefano;Liu, Fang;Matta, Selene;Demontis, Valeria;Marongiu, Daniela;Pintus, Paolo;Saba, Michele;Mura, Andrea;Quochi, Francesco;Bongiovanni, Giovanni
2025-01-01
Abstract
We study amplified spontaneous emission (ASE) in MAPbBr₃ planar waveguides using femtosecond spectroscopy. We show that ASE happens without optical gain, and involves exciton-polaritons at low excitations and new hybrid states at high excitations.
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