Signature of the microcavity exciton-polariton relaxation mechanism in the polarization of emitted light

Journal Article · Fri May 15 00:00:00 EDT 2009 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.79.195310· OSTI ID:21287018

Roumpos, Georgios ^[1]; Lai, Chih-Wei; Yamamoto, Yoshihisa ^[1]; Liew, T C. H. ^[2]; Rubo, Yuri G ^[3]; Kavokin, A V ^[3]

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1. E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305 (United States)
2. Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore)
3. School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ (United Kingdom)

We have performed real and momentum space spin-dependent spectroscopies of spontaneously formed exciton polariton condensates for a nonresonant pumping scheme. Under a linearly polarized pump, our results can be understood in terms of spin-dependent Boltzmann equations in a two-state model. This suggests that relaxation into the ground state occurs after multiple phonon-scattering events and only one polariton-polariton scattering. For the circular pumping case, in which only excitons of one spin are injected, a bottleneck effect is observed, implying inefficient relaxation.

• OSTI ID: 21287018
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 19 Vol. 79; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
BOLTZMANN EQUATION
CONDENSATES
EXCITONS
GALLIUM ARSENIDES
GROUND STATES
PHONONS
POLARIZATION
POLARONS
QUANTUM WELLS
RELAXATION
SCATTERING
SEMICONDUCTOR MATERIALS
SPECTROSCOPY
SPIN