Restrictions on the coherence of the ultrafast optical emission from an electron-hole pairs condensate

Details Restrictions on the coherence of the ultrafast optical emission from an electron-hole pairs condensate Restrictions on the coherence of the ultrafast optical emission from an electron-hole pairs condensate

2001-06-27

arxiv.org/abs/cond-mat/0106560v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages,3 figures, to be published in Physical Review Letters. Minor changes

Scientific paper

10.1103/PhysRevLett.87.246403

We report on the transfer of coherence from a quantum-well electron-hole condensate to the light it emits. As a function of density, the coherence of the electron-hole pair system evolves from being full for the low density Bose-Einstein condensate to a chaotic behavior for a high density BCS-like state. This degree of coherence is transfered to the light emitted in a damped oscillatory way in the ultrafast regime. Additionally, the photon field exhibits squeezing properties during the transfer time. We analyze the effect of light frequency and separation between electron and hole layers on the optical coherence. Our results suggest new type of ultrafast experiments for detecting electron-hole pair condensation.

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