Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold
Name
PhysRevB.100.085301.pdf
Description
Published version
Size
2.91 MB
Format
Adobe PDF
Checksum (MD5)
264d5bd72dd207cfa8ac8ce9ccaff3d7
Author(s)
Pieczarka, M.
Boozarjmehr, M.
Estrecho, E.
Yoon, Yoseob
Steger, M.
West, K.
Pfeiffer, L. N.
Nelson, Keith Adam
Snoke, D. W.
Truscott, A. G.
Date Issued
August 5, 2019
Journal
Physical Review B
Publisher
American Physical Society (APS)
Citation
Pieczarka, M. et al. "Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold." Physical Review B 100, 8 (August 15, 2019): 085301 © 2019 American Physical Society
Version
Final published version
Abstract
Exciton-polaritons (polaritons herein) offer a unique nonlinear platform for studies of collective macroscopic quantum phenomena in a solid-state system. Shaping of polariton flow and polariton confinement via potential landscapes created by nonresonant optical pumping has gained considerable attention due to the flexibility and control enabled by optically induced potentials. Recently, large density-dependent energy shifts (blueshifts) exhibited by optically trapped polaritons at low densities, below the bosonic condensation threshold, were interpreted as an evidence of strong polariton-polariton interactions [Y. Sun, Nat. Phys. 13, 870 (2017)10.1126/science.1074464]. In this work, we further investigate the origins of these blueshifts in optically induced circular traps and present evidence of significant blueshifts of the polariton energy due to reshaping of the optically induced potential with laser pump power. Our work demonstrates the strong influence of the effective potential formed by an optically injected excitonic reservoir on the energy blueshifts observed below and up to the polariton condensation threshold and suggests that the observed blueshifts arise due to interaction of polaritons with the excitonic reservoir, rather than due to polariton-polariton interaction. Keywords: exciton polariton; quantum fluids & solids; quantum wells; photoluminescence
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1103/physrevb.100.085301
