Polariton relaxation and polariton nonlinearities in nonresonantly cw-pumped III-nitride slab waveguides
Artikel i vetenskaplig tidskrift, 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.


Joachim Ciers

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

D. D. Solnyshkov

Institut Universitaire de France

Université Clermont Auvergne

G. Callsen

Ecole Polytechnique Federale de Lausanne (EPFL)

Universität Bremen

Y. Kuang

Ecole Polytechnique Federale de Lausanne (EPFL)

J-F Carlin

Ecole Polytechnique Federale de Lausanne (EPFL)

G. Malpuech

Université Clermont Auvergne

R. Butte

Ecole Polytechnique Federale de Lausanne (EPFL)

N. Grandjean

Ecole Polytechnique Federale de Lausanne (EPFL)


2469-9950 (ISSN) 2469-9969 (eISSN)

Vol. 102 15 155304


Atom- och molekylfysik och optik

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