Room-Temperature Macroscopic Coherence of Two Electron-Hole Plasmas in a Microcavity

Qi Jie, Keye Zhang, Chih Wei Lai, Feng Kuo Hsu, Weiping Zhang*, Song Luo, Yi Shan Lee, Sheng Di Lin, Zhanghai Chen, Wei Xie

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Macroscopic coherence of Bose condensates is a fundamental and practical phenomenon in many-body systems, such as the long-range correlation of exciton-polariton condensates with a dipole density typically below the exciton Mott-transition limit. Here we extend the macroscopic coherence of electron-hole-photon interacting systems to a new region in the phase diagram - the high-density plasma region, where long-range correlation is generally assumed to be broken due to the rapid dephasing. Nonetheless, a cooperative state of electron-hole plasma does emerge through the sharing of the superfluorescence field in an optical microcavity. In addition to the in situ coherence of e-h plasma, a long-range correlation is formed between two 8-μm-spaced plasma ensembles even at room temperature. Quantized and self-modulated correlation modes are generated for e-h ensembles in the plasma region. By controlling the distance between the two ensembles, multiple coupling regimes are revealed, from strong correlation to perturbative phase correlation and finally to an incoherent classical case, which has potential implications for tunable and high-temperature-compatible quantum devices.

Original languageEnglish
Article number157402
Number of pages6
JournalPhysical Review Letters
Volume124
Issue number15
DOIs
StatePublished - 17 Apr 2020

Keywords

  • BOSE-EINSTEIN CONDENSATION

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