Abstract
Polariton condensation of one-dimensional multimode whispering gallery mode exciton polaritons is investigated in hexagonal ZnO microwires at cryogenic temperatures. At threshold, stimulated scattering is fed by the resonant emission from highly populated defect-bound excitons. With further increasing excitation power, condensates relax within the multimode whispering gallery mode polariton ladder, leading to their effective evaporative cooling. The relaxation is a parametric polariton-polariton scattering process evidenced by its intensity, energy, and momentum evolution. The experimental observations are in good agreement with numerical simulations based on a model for polariton-polariton scattering extended to the multimodal whispering gallery mode system.
Original language | English |
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Article number | 041202 |
Number of pages | 6 |
Journal | Physical Review. B, Condensed matter and materials physics |
Volume | 91 |
Issue number | 4 |
DOIs | |
Publication status | Published - 16 Jan 2015 |
Keywords
- Semiconductor microcavities
- Zinc-oxide
- Vortices