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

Joachim Ciers; D. D. Solnyshkov; G. Callsen; Y. Kuang; J-F Carlin; G. Malpuech; R. Butte; N. Grandjean

doi:10.1103/PhysRevB.102.155304

Polariton relaxation and polariton nonlinearities in nonresonantly cw-pumped III-nitride slab waveguides
Journal article, 2020

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.

Author

Joachim Ciers

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Other publications Research

D. D. Solnyshkov

Clermont Auvergne University

Institut Universitaire de France