Coherence of the exciton condensate luminescence
Racah Institute of Physics, The Hebrew University - Jerusalem 91904, Israel
Accepted: 21 May 1998
A new experiment to detect Bose-Einstein condensation of excitons is suggested. The experiment is a photon-counting measurement of the exciton luminescence with two detectors. As a result, the number of photons N(t) and the second-order coherence emitted during the time interval t can be obtained. These quantities contain contributions from both the normal component and the condensate. It is shown in the paper that the number of photons emitted by a condensate, , can be found from the expression . The integration of over the spectrum gives the value of the order parameter.
PACS: 71.35.Lk – Collective effects (Bose effects, phase space filling, and excitonic phase transitions) / 71.35.Ee – Electron-hole drops and electron-hole plasma / 78.55.-m – Photoluminescence
© EDP Sciences, 1998