Highly-Excited Rydberg Excitons in Synthetic Thin-Film Cuprous Oxide

• URL: http://arxiv.org/abs/2210.16416v1
• Date: Fri, 28 Oct 2022 21:50:20 GMT
• Title: Highly-Excited Rydberg Excitons in Synthetic Thin-Film Cuprous Oxide
• Authors: Jacob DeLange, Kinjol Barua, Val Zwiller, Stephan Steinhauer, Hadiseh Alaeian
• Abstract summary: Cuprous oxide (Cu$$O) has been proposed as a promising solid-state host for excitonic Rydberg states with large principal quantum numbers. We present spectroscopic and photoluminescence studies of Rydberg excitons in synthetic Cu$$O grown on a transparent substrate. These results open a new portal to scalable and integrable on-chip Rydberg-based quantum devices.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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