Restrictions on the coherence of the ultrafast optical emission from an electron-hole-pair condensate.
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 transferred to the light emitted in a damped oscillatory way in the ultrafast regime. Additionally, the photon field exhibits squeezing properties during the transfer time. Our results suggest a new type of ultrafast experiments for detecting electron-hole-pair condensation.
Olaya-Castro
A
A
Departamento de Física, Universidad de Los Andes, A.A. 4976, Bogotá D.C., Colombia.
Rodríguez
F J
FJ
Quiroga
L
L
Tejedor
C
C