Generation of Quantized Polaritons below the Condensation Threshold

Peter Cristofolini, Z. Hatzopoulos, Pavlos G. Savvidis, and Jeremy J. Baumberg
Phys. Rev. Lett. 121, 067401 – Published 7 August 2018

Abstract

Exciton polaritons in high quality semiconductor microcavities can travel long macroscopic distances (>100μm) due to their ultralight effective mass. The polaritons are repelled from optically pumped exciton reservoirs where they are formed; however, their spatial dynamics is not as expected for pointlike particles. Instead we show polaritons emitted into waveguides travel orthogonally to the repulsive potential gradient and can only be explained if they are emitted as macroscopic delocalized quantum particles, even before they form Bose condensates.

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  • Received 6 February 2018
  • Revised 27 April 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.067401

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & OpticalGeneral PhysicsFluid Dynamics

Authors & Affiliations

Peter Cristofolini1, Z. Hatzopoulos2, Pavlos G. Savvidis2,3,4, and Jeremy J. Baumberg1,*

  • 1Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
  • 2FORTH, IESL, 71110 Heraklion, Crete, Greece
  • 3Department of Materials Science and Technology, University of Crete, 71003 Heraklion, Crete, Greece
  • 4Spin Optics Laboratory, Saint-Petersburg State University, 198504, St-Petersburg, Russia

  • *jjb12@cam.ac.uk

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Issue

Vol. 121, Iss. 6 — 10 August 2018

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