Polariton relaxation and polariton nonlinearities in nonresonantly cw-pumped III-nitride slab waveguides - Archive ouverte HAL Access content directly
Journal Articles Physical Review B Year : 2020

Polariton relaxation and polariton nonlinearities in nonresonantly cw-pumped III-nitride slab waveguides

J. Ciers
  • Function : Author
D. Solnyshkov
G. Callsen
  • Function : Author
Y. Kuang
  • Function : Author
J.-F. Carlin
  • Function : Author
Guillaume Malpuech
  • Function : Author
R. Butté
N. Grandjean

Abstract

Polariton lasers are mostly based on planar cavities. Here, we focus on an alternative configuration with slab waveguide modes strongly coupled to excitons confined in GaN/AlGaN quantum wells. We study experimentally and theoretically polariton relaxation at temperatures ranging from 4 to 200 K. We observe a good robustness of the lower polariton population peak energy position against temperature changes due to a balance between the shift of the exciton energy and the change in the normal mode splitting, a promising feature for future applications such as lasers and amplifiers where a small temperature drift in the emission wavelength is a desired asset. Finally, at T = 4 K we observe the signature of polariton nonlinearities occurring in the continuous wave regime that are assigned to an optical parametric oscillation process.
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Dates and versions

hal-03040808 , version 1 (04-12-2020)

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J. Ciers, D. Solnyshkov, G. Callsen, Y. Kuang, J.-F. Carlin, et al.. Polariton relaxation and polariton nonlinearities in nonresonantly cw-pumped III-nitride slab waveguides. Physical Review B, 2020, 102 (15), ⟨10.1103/PhysRevB.102.155304⟩. ⟨hal-03040808⟩
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