Asymmetric Rydberg blockade of giant excitons in Cuprous Oxide.
Asymmetric Rydberg blockade of giant excitons in Cuprous Oxide.
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DOI：
10.1038/s41467-021-23852-z
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发表时间：
2021-06-11
影响因子：
16.6
通讯作者：
Aßmann M
中科院分区：
文献类型：
--
作者：
Heckötter J;Walther V;Scheel S;Bayer M;Pohl T;Aßmann M
通过高激发电子态产生和控制强远程相互作用的能力，是最近从原子和分子物理到量子光学和技术等一系列领域取得突破的基础。里德堡激子为这种高激发态提供了一种很有希望的固态实现方式，在氧化亚铜半导体中确实观察到了打破记录的高达一微米的轨道尺寸。在这里，我们演示了通过光学产生两个不同的里德堡激子量子态来产生和控制这种材料中强激子相互作用的过程。这是通过双色泵浦探测实验实现的，该实验允许对相互作用进行详细探测。我们的实验揭示了强空间关联的出现和跨越数微米的巨大距离的州际里德堡封锁。产生的半导体激子的多体状态表现出只依赖于相互作用势形状的普遍性质，并为其极大地扩展射程和幂定律特性提供了明确的证据。以往的研究表明，Cu2O中存在大主量子数的里德堡激子。在这里，作者利用双色泵浦-探测光谱学，演示了这些巨大里德堡激子之间长程关联的产生和控制，从而导致激子阻塞。
The ability to generate and control strong long-range interactions via highly excited electronic states has been the foundation for recent breakthroughs in a host of areas, from atomic and molecular physics to quantum optics and technology. Rydberg excitons provide a promising solid-state realization of such highly excited states, for which record-breaking orbital sizes of up to a micrometer have indeed been observed in cuprous oxide semiconductors. Here, we demonstrate the generation and control of strong exciton interactions in this material by optically producing two distinct quantum states of Rydberg excitons. This is made possible by two-color pump-probe experiments that allow for a detailed probing of the interactions. Our experiments reveal the emergence of strong spatial correlations and an inter-state Rydberg blockade that extends over remarkably large distances of several micrometers. The generated many-body states of semiconductor excitons exhibit universal properties that only depend on the shape of the interaction potential and yield clear evidence for its vastly extended-range and power-law character. Previous research showed the existence of Rydberg excitons with large principle quantum numbers in Cu2O. Here, by using two-color pump-probe optical spectroscopy, the authors demonstrate the generation and control of long-range correlations between these giant Rydberg excitons, leading to exciton blockade.
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