Determination of Polariton Condensates' Critical Temperature
Abstract
The thermal robustness of traveling polariton condensates is investigated. We create remote condensates that have never been in contact, and study their interference in momentum space, when they travel with the same velocity, by means of time-resolved photoluminescence. We determine the condensed to thermal, uncondensed polariton fraction, which shows a gradual decay with increasing temperature, and obtain the critical temperature for the Bose-Einstein-like condensate (BEC) phase transition. We tentatively compare our experimental findings with theoretical models, developed for atomic condensates, to describe the condensates' coherence fading with temperature.
- Publication:
-
Physica Status Solidi B Basic Research
- Pub Date:
- June 2019
- DOI:
- 10.1002/pssb.201800519
- arXiv:
- arXiv:1902.04358
- Bibcode:
- 2019PSSBR.25600519R
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 13 pages and 4 figures