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Microwave-optical coupling via Rydberg excitons in cuprous oxide

Gallagher, Liam A.P.; Rogers, Joshua P.; Pritchett, Jon D.; Mistry, Rajan A.; Pizzey, Danielle; Adams, Charles S.; Jones, Matthew P.A.; Grünwald, Peter; Walther, Valentin; Hodges, Chris; Langbein, Wolfgang; Lynch, Stephen A.

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Authors

Liam Gallagher liam.a.gallagher@durham.ac.uk
Post Doctoral Research Associate

Joshua P. Rogers

Profile image of Jon Pritchett

Jon Pritchett jonathan.pritchett@durham.ac.uk
PGR Student Doctor of Philosophy

Rajan A. Mistry

Peter Grünwald

Valentin Walther

Chris Hodges

Wolfgang Langbein

Stephen A. Lynch



Abstract

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.

Citation

Gallagher, L. A., Rogers, J. P., Pritchett, J. D., Mistry, R. A., Pizzey, D., Adams, C. S., Jones, M. P., Grünwald, P., Walther, V., Hodges, C., Langbein, W., & Lynch, S. A. (2022). Microwave-optical coupling via Rydberg excitons in cuprous oxide. Physical Review Research, 4(1), https://doi.org/10.1103/physrevresearch.4.013031

Journal Article Type Article
Acceptance Date Dec 1, 2021
Online Publication Date Jan 13, 2021
Publication Date 2022
Deposit Date Feb 22, 2022
Publicly Available Date Feb 22, 2022
Journal Physical Review Research
Electronic ISSN 2643-1564
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 4
Issue 1
DOI https://doi.org/10.1103/physrevresearch.4.013031
Public URL https://durham-repository.worktribe.com/output/1216429

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Copyright Statement
Published by the American Physical Society under the terms of the
Creative Commons Attribution 4.0 International license. Further
distribution of this work must maintain attribution to the author(s)
and the published article’s title, journal citation, and DOI.






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