论文标题
合成薄膜氧化物中高度兴奋的Rydberg激子
Highly-Excited Rydberg Excitons in Synthetic Thin-Film Cuprous Oxide
论文作者
论文摘要
最近已提出氧化乡土（Cu $ {} _ 2 $ O）作为具有较大主要量子数（$ n $）的激子Rydberg状态的有前途的固态宿主，其夸张的波函数尺寸（$ \ propto n^2）$促进了巨大的depole-depole depole（$ \ propto n^4 $）$ \ propto n^4 $ $ n^4 $）互动，使其成为固态量子技术的理想基础。合成的，薄膜cu $ {} _ 2 $ o样品特别感兴趣，因为它们可以通过精心控制的制造不含缺陷，并且原则上适合观察由Rydberg Blockade引起的极端单光子非线性。在这里，我们介绍了合成cu $ {} _ 2 $ o在透明基板上生长的Rydberg激子的光谱吸收和光致发光研究，报告了黄色激子系列最高$ n = 7 $。我们在高达2 MW的幂中进行这些研究，温度高达150 K，这是可以观察到Rydberg系列的最高温度。这些结果为基于Rydberg的芯片上的可扩展和可集成的量子设备打开了新的门户。
Cuprous oxide (Cu${}_2$O) has recently been proposed as a promising solid-state host for excitonic Rydberg states with large principal quantum numbers ($n$), whose exaggerated wavefunction sizes ($\propto n^2)$ facilitate gigantic dipole-dipole ($\propto n^4$) and van der Waals ($\propto n^{11}$) interactions, making them an ideal basis for solid-state quantum technology. Synthetic, thin-film Cu${}_2$O samples are of particular interest because they can be made defect-free via carefully controlled fabrication and are, in principle, suitable for the observation of extreme single-photon nonlinearities caused by the Rydberg blockade. Here, we present spectroscopic absorption and photoluminescence studies of Rydberg excitons in synthetic Cu${}_2$O grown on a transparent substrate, reporting yellow exciton series up to $n = 7$. We perform these studies at powers up to 2 mW and temperatures up to 150 K, the highest temperature where Rydberg series can be observed. These results open a new portal to scalable and integrable on-chip Rydberg-based quantum devices.
