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4 October 2024 Quasi-bound state in continuum in distributed feedback lasers based on perovskite thin-films
Sarah HAMDAD, Nirav Annavarapu, Iakov Goldberg, Karim Elkhouly, Renaud Puybaret, Deniz Sabuncuoglu Tezcan, Jan Genoe, Robert Gehlhaar, Paul Heremans
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Proceedings Volume PC13116, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XXI; PC1311604 (2024) https://doi.org/10.1117/12.3027790
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
Distributed feedback lasers (DFBs) using perovskite gain media can provide many unique properties such as single mode lasing and low pump thresholds. An important characteristic of lasing is the polarization because its control permits to manipulate the light. We present a study on optically pumped perovskite DFB gratings over a wide range of periods and duty cycles. Detailed analysis in the k-space of the lowest threshold lasing mode reveal the signature of a quasi-bound state in continuum (quasi-BIC) near Gamma-point, and additional radiative channels with mixed polarization states rising from the coupling of the counter propagating waves. The obtained results permit to map the far field distribution of polarization states and show the potential of a tuneable DFB based-BIC lasing.
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Sarah HAMDAD, Nirav Annavarapu, Iakov Goldberg, Karim Elkhouly, Renaud Puybaret, Deniz Sabuncuoglu Tezcan, Jan Genoe, Robert Gehlhaar, and Paul Heremans "Quasi-bound state in continuum in distributed feedback lasers based on perovskite thin-films", Proc. SPIE PC13116, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XXI, PC1311604 (4 October 2024); https://doi.org/10.1117/12.3027790
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KEYWORDS
Perovskite
Polarization
Thin films
Optical pumping
Semiconductor lasers
Optical gratings
Optical resonators
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