Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation
Abstract
Bosonic condensates of exciton polaritons (light-matter quasiparticles in a semiconductor) provide a solid-state platform for studies of nonequilibrium quantum systems with a spontaneous macroscopic coherence. These driven, dissipative condensates typically coexist and interact with an incoherent reservoir, which undermines measurements of key parameters of the condensate. Here, we overcome this limitation by creating a high-density exciton-polariton condensate in an optically induced box trap. In this so-called Thomas-Fermi regime, the condensate is fully separated from the reservoir and its behavior is dominated by interparticle interactions. We use this regime to directly measure the polariton-polariton interaction strength, and reduce the existing uncertainty in its value from four orders of magnitude to within three times the theoretical prediction. The Thomas-Fermi regime has previously been demonstrated only in ultracold atomic gases in thermal equilibrium. In a nonequilibrium exciton-polariton system, this regime offers a novel opportunity to study interaction-driven effects unmasked by an incoherent reservoir.
- Authors:
-
- Australian National Univ., Canberra, ACT (Australia)
- Tianjin Univ. (China)
- Polish Academy of Sciences (PAS), Warsaw (Poland).
- Japan Science and Technology Agency (JST), Saitama (Japan); RIKEN Center for Emergent Matter Science, Saitama (Japan)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Princeton Univ., NJ (United States)
- Monash Univ., Melbourne, VIC (Australia)
- Nanyang Technological Univ. (Singapore)
- Polish Academy of Sciences (PAS), Warsaw (Poland)
- Univ. of Pittsburgh, PA (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1557406
- Report Number(s):
- NREL/JA-5K00-74563
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 3; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Bose-Einstein condensates; exciton polariton; polaritons; quasiparticles; collective excitations
Citation Formats
Estrecho, E., Gao, T., Bobrovska, N., Comber-Todd, D., Fraser, M. D., Steger, Mark, West, K., Pfeiffer, L. N., Levinsen, J., Parish, M. M., Liew, T. C. H., Matuszewski, M., Snoke, D. W., Truscott, A. G., and Ostrovskaya, E. A. Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.100.035306.
Estrecho, E., Gao, T., Bobrovska, N., Comber-Todd, D., Fraser, M. D., Steger, Mark, West, K., Pfeiffer, L. N., Levinsen, J., Parish, M. M., Liew, T. C. H., Matuszewski, M., Snoke, D. W., Truscott, A. G., & Ostrovskaya, E. A. Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation. United States. https://doi.org/10.1103/PhysRevB.100.035306
Estrecho, E., Gao, T., Bobrovska, N., Comber-Todd, D., Fraser, M. D., Steger, Mark, West, K., Pfeiffer, L. N., Levinsen, J., Parish, M. M., Liew, T. C. H., Matuszewski, M., Snoke, D. W., Truscott, A. G., and Ostrovskaya, E. A. Mon .
"Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation". United States. https://doi.org/10.1103/PhysRevB.100.035306. https://www.osti.gov/servlets/purl/1557406.
@article{osti_1557406,
title = {Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation},
author = {Estrecho, E. and Gao, T. and Bobrovska, N. and Comber-Todd, D. and Fraser, M. D. and Steger, Mark and West, K. and Pfeiffer, L. N. and Levinsen, J. and Parish, M. M. and Liew, T. C. H. and Matuszewski, M. and Snoke, D. W. and Truscott, A. G. and Ostrovskaya, E. A.},
abstractNote = {Bosonic condensates of exciton polaritons (light-matter quasiparticles in a semiconductor) provide a solid-state platform for studies of nonequilibrium quantum systems with a spontaneous macroscopic coherence. These driven, dissipative condensates typically coexist and interact with an incoherent reservoir, which undermines measurements of key parameters of the condensate. Here, we overcome this limitation by creating a high-density exciton-polariton condensate in an optically induced box trap. In this so-called Thomas-Fermi regime, the condensate is fully separated from the reservoir and its behavior is dominated by interparticle interactions. We use this regime to directly measure the polariton-polariton interaction strength, and reduce the existing uncertainty in its value from four orders of magnitude to within three times the theoretical prediction. The Thomas-Fermi regime has previously been demonstrated only in ultracold atomic gases in thermal equilibrium. In a nonequilibrium exciton-polariton system, this regime offers a novel opportunity to study interaction-driven effects unmasked by an incoherent reservoir.},
doi = {10.1103/PhysRevB.100.035306},
journal = {Physical Review B},
number = 3,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}
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FIG. 1: High-density single-mode condensation. (a) Pump power series of total photoluminescence intensity (blue) and ground state density of polaritons (orange). Pth is the pump threshold for condensation. (b-f) Real space distribution and the corresponding (g-k) dispersion (spatially filtered emission from inside the trap) of polaritons at increasing pump powermore »
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Works referencing / citing this record:
Dispersion relation of the collective excitations in a resonantly driven polariton fluid
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