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Title: Drag effects in a system of electrons and microcavity polaritons

The theory of the drag effects in the system of spatially separated electrons and excitons in coupled quantum wells (QWs) embedded in an optical microcavity is developed. It is shown that at low temperature an electron current induces the polariton flow, therefore, a transport of photons along the cavity. However, the electron current dragged by the polariton flow is strongly suppressed below polariton superfluid transition temperature and hence, the strong suppression of the induced electron current indicates the superfluidity of polaritons. Therefore, the transport properties of polaritons can be investigated by measuring the current or voltage in the electron subsystem. At high temperatures, we study the exciton-electron drag effects. At high-temperatures regime, from one hand, the existence of the electric current in an electron QW induces the exciton flow in the other QW, from the other hand, the electron current in one QW induces the exciton flow in the other QW via the drag of excitons by the electrons. The drag coefficients for the polariton-electron systems are calculated and analyzed. We discuss the possible experimental observation of the drag effects in the system of electrons and microcavity polaritons, that also allow to observe the cavity polaritons superfluidity.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Physics Department, New York City College of Technology, City University of New York, Brooklyn, New York 11201 (United States)
  2. Physics Department, New York City College of Technology, The City University of New York, Brooklyn, New York 11201 (United States)
  3. (United States)
  4. Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow Region (Russian Federation)
  5. (Russian Federation)
Publication Date:
OSTI Identifier:
21421425
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 82; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevB.82.125307; (c) 2010 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; ELECTRONS; EXCITONS; PHOTONS; POLARONS; QUANTUM WELLS; SUPERFLUIDITY; TRANSITION TEMPERATURE BOSONS; CURRENTS; ELEMENTARY PARTICLES; FERMIONS; LEPTONS; MASSLESS PARTICLES; NANOSTRUCTURES; PHYSICAL PROPERTIES; QUASI PARTICLES; THERMODYNAMIC PROPERTIES