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Rydberg exciton–polaritons in a Cu2O microcavity
Nature Materials ( IF 41.2 ) Pub Date : 2022-04-14 , DOI: 10.1038/s41563-022-01230-4
Konstantinos Orfanakis 1 , Sai Kiran Rajendran 1 , Valentin Walther 2, 3 , Thomas Volz 4, 5 , Thomas Pohl 6 , Hamid Ohadi 1
Affiliation  

Giant Rydberg excitons with principal quantum numbers as high as n = 25 have been observed in cuprous oxide (Cu2O), a semiconductor in which the exciton diameter can become as large as 1 μm. The giant dimension of these excitons results in excitonic interaction enhancements of orders of magnitude. Rydberg exciton–polaritons, formed by the strong coupling of Rydberg excitons to cavity photons, are a promising route to exploit these interactions and achieve a scalable, strongly correlated solid-state platform. However, the strong coupling of these excitons to cavity photons has remained elusive. Here, by embedding a thin Cu2O crystal into a Fabry–Pérot microcavity, we achieve strong coupling of light to Cu2O Rydberg excitons up to n = 6 and demonstrate the formation of Cu2O Rydberg exciton–polaritons. These results pave the way towards realizing strongly interacting exciton–polaritons and exploring strongly correlated phases of matter using light on a chip.



中文翻译:

Cu2O 微腔中的里德堡激子-极化子

 已在氧化亚铜 (Cu 2 O) 中观察到主量子数高达n = 25 的巨型里德堡激子,这是一种激子直径可大至1 μm 的半导体。这些激子的巨大尺寸导致激子相互作用增强了数量级。由里德堡激子与腔光子的强耦合形成的里德堡激子-极化子是利用这些相互作用并实现可扩展的强相关固态平台的有希望的途径。然而,这些激子与腔光子的强耦合仍然难以捉摸。在这里,通过将薄的 Cu 2 O 晶体嵌入到 Fabry-Pérot 微腔中,我们实现了光与 Cu 2的强耦合O Rydberg 激子达到n  = 6 并证明 Cu 2 O Rydberg 激子-极化子的形成。这些结果为实现强相互作用的激子-极化子和利用芯片上的光探索物质的强相关相铺平了道路。

更新日期:2022-04-14
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