Version 2 2023-06-08, 12:44Version 2 2023-06-08, 12:44
Version 1 2023-01-11, 22:46Version 1 2023-01-11, 22:46
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posted on 2023-06-08, 12:44authored bySurendra B. Anantharaman, Christopher E. Stevens, Jason Lynch, Baokun Song, Jin Hou, Huiqin Zhang, Kiyoung Jo, Pawan Kumar, Jean-Christophe Blancon, Aditya D. Mohite, Joshua R. Hendrickson, Deep Jariwala
Light-matter coupling in excitonic materials has been the subject of intense investigation due to emergence of new excitonic materials. Two-dimensional layered hybrid organic/inorganic perovskites (2D HOIPs) support strongly bound excitons at room-temperatures with some of the highest oscillator strengths and electric loss tangents among the known excitonic materials. Here, we report strong light-matter coupling in Ruddlesden-Popper phase 2D-HOIPs crystals without the necessity of an external cavity. We report concurrent occurrence of multiple-orders of hybrid light-matter states via both reflectance and luminescence spectroscopy in thick (> 100 nm) crystals and near-unity absorption in thin (< 20 nm) crystals. We observe resonances with quality factors > 250 in hybridized exciton-polaritons and identify a linear correlation between exciton-polariton mode splitting and extinction coefficient of the various 2D-HOIPs. Our work opens the door to studying polariton dynamics in self-hybridized and open cavity systems with broad applications in optoelectronics and photochemistry.
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