Coherence of the exciton condensate luminescence

B. Laikhtman

doi:10.1209/epl/i1998-00318-5

All issues

Volume 43 / No 1 (July I 1998)

Europhys. Lett., 43 1 (1998) 53-58

Abstract

Issue		Europhys. Lett. Volume 43, Number 1, July I 1998


Page(s)		53 - 58
Section		Condensed matter: electronic structure, electrical, magnetic and optical properties
DOI		https://doi.org/10.1209/epl/i1998-00318-5
Published online		01 September 2002

Europhys. Lett., 43 (1), pp. 53-58 (1998)

Coherence of the exciton condensate luminescence

B. Laikhtman

Racah Institute of Physics, The Hebrew University - Jerusalem 91904, Israel

Received: 26 February 1998
Accepted: 21 May 1998

Abstract

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 $g^{(2)}(t)$ 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, $N^{(2)}(t)$ , can be found from the expression $[N^{(2)}(t) ]^{2}=2 [N(t) ]^{2}-g^{(2)}(t)$ . The integration of $N^{(2)}(t)$ 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

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