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Title: Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold

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 et al., Nat. Phys. 13, 870 (2017)]. 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.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [5];  [3];  [6];  [7]; ORCiD logo [2]
  1. Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering; Univ. of Wroclaw (Poland). Dept. of Experimental Physics
  2. Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Chemisrty
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  5. Princeton Univ., NJ (United States). Electrical Engineering Dept.
  6. Univ. of Pittsburgh, PA (United States). Dept. of Physics and Astronomy
  7. Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering
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:
1559928
Report Number(s):
NREL/JA-5K00-74731
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: 8; 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; exciton polariton; quantum fluids and solids; quantum wells; photoluminescence

Citation Formats

Pieczarka, M., Boozarjmehr, M., Estrecho, E., Yoon, Y., Steger, M., West, K., Pfeiffer, L. N., Nelson, K. A., Snoke, D. W., Truscott, A. G., and Ostrovskaya, E. A. Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.085301.
Pieczarka, M., Boozarjmehr, M., Estrecho, E., Yoon, Y., Steger, M., West, K., Pfeiffer, L. N., Nelson, K. A., Snoke, D. W., Truscott, A. G., & Ostrovskaya, E. A. Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold. United States. doi:10.1103/PhysRevB.100.085301.
Pieczarka, M., Boozarjmehr, M., Estrecho, E., Yoon, Y., Steger, M., West, K., Pfeiffer, L. N., Nelson, K. A., Snoke, D. W., Truscott, A. G., and Ostrovskaya, E. A. Mon . "Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold". United States. doi:10.1103/PhysRevB.100.085301.
@article{osti_1559928,
title = {Effect of optically induced potential on the energy of trapped exciton polaritons below the condensation threshold},
author = {Pieczarka, M. and Boozarjmehr, M. and Estrecho, E. and Yoon, Y. and Steger, M. and West, K. and Pfeiffer, L. N. and Nelson, K. A. and Snoke, D. W. and Truscott, A. G. and Ostrovskaya, E. A.},
abstractNote = {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 et al., Nat. Phys. 13, 870 (2017)]. 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.},
doi = {10.1103/PhysRevB.100.085301},
journal = {Physical Review B},
number = 8,
volume = 100,
place = {United States},
year = {2019},
month = {8}
}

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