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Asymmetric Rydberg blockade of giant excitons in Cuprous Oxide

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  • Julian Heckötter, Dortmund University
  • ,
  • Valentin Walther, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
  • ,
  • Stefan Scheel, University of Rostock
  • ,
  • Manfred Bayer, Russian Academy of Sciences, Technische Universität, Dortmund
  • ,
  • Thomas Pohl
  • Marc Aßmann, Dortmund University, Technische Universität, Dortmund

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.

TidsskriftNature Communications
StatusUdgivet - jun. 2021

Bibliografisk note

Funding Information:
We would like to thank Sjard Ole Krüger for fruitful discussions. This work was supported by the Carlsberg Foundation through the ‘Semper Ardens’ Research Project QCooL, by the DFG through the SPP 1929 GiRyd (project numbers: 316133134, 316159498 and 316214921) and the TRR 160 (project number: 249492093, project: A8), by the DFG and TU Dortmund University by the funding programme Open Access Publishing, by the European Commission through the H2020-FETOPEN project ErBeStA (No. 800942), by the DNRF through a Niels Bohr Professorship to TP and the DNRF Center of Excellence "CCQ” (Grant agreement no.: DNRF156) and by the NSF through a grant for the Institute for Theoretical Atomic, Molecular, and Optical Physics at Harvard University and the Smithsonian Astrophysical Observatory.

Publisher Copyright:
© 2021, The Author(s).

Copyright 2021 Elsevier B.V., All rights reserved.

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