Microwave-optical coupling via Rydberg excitons in cuprous oxide
Microwave-optical coupling via Rydberg excitons in cuprous oxide
复制标题
DOI：
10.1103/physrevresearch.4.013031
复制
发表时间：
2022-01-13
影响因子：
4.2
通讯作者：
Lynch, Stephen A.
中科院分区：
文献类型：
--
作者：
Gallagher, Liam A. P.;Rogers, Joshua P.;Lynch, Stephen A.
我们报告激子介导的微波和光场之间的耦合在氧化亚铜（CuO）在低温下。在4K下，用单光子（吸收）和双光子（二次谐波产生）光谱观察到主量子数n = 12的里德伯激子态。在与激子态共振附近，微波场的加入显著改变了吸收线的形状，并在微波频率处向相干二次谐波添加了边带。这两种效应都表现出对n和角动量l的复杂依赖性。所有这些功能是在半定量协议与模型的基础上带内电偶极跃迁之间的里德堡激子状态。用一个简单的微波天线，我们已经达到了一个政权的微波耦合（拉比频率）是可比的非辐射加宽的里德伯激子的线宽。这一结果为激子态的调控提供了新的途径，并为基于里德伯激子的低温微波-光转换器的研制提供了可能。
We report exciton-mediated coupling between microwave and optical fields in cuprous oxide (Cu2O) at low temperatures. Rydberg excitonic states with principal quantum number up to n = 12 were observed at 4 K using both one-photon (absorption) and two-photon (second harmonic generation) spectroscopy. Near resonance with an excitonic state, the addition of a microwave field significantly changed the absorption line shape, and added sidebands at the microwave frequency to the coherent second harmonic. Both effects showed a complex dependence on n and angular momentum l. All of these features are in semiquantitative agreement with a model based on intraband electric dipole transitions between Rydberg exciton states. With a simple microwave antenna we already reach a regime where the microwave coupling (Rabi frequency) is comparable to the nonradiatively broadened linewidth of the Rydberg excitons. The results provide an additional way to manipulate excitonic states, and open up the possibility of a cryogenic microwave to optical transducer based on Rydberg excitons.