Defects management in the gain media of GeSn micro-disk lasers

Authors :: Xavier Checoury
Nicolas Pauc
Emilie Sakat
Isabelle Sagnes
Alexei Chelnokov
K. Pantzas
C. Villebasse
A. Durnez
Vincent Calvo
Frederic Boeuf
M. El Kurdi
Etienne Herth
Gilles Patriarche
Binbin Wang
J.M. Hartmann
Vincent Reboud
Anas Elbaz
Jérémie Chrétien
Lara Casiez
Source :: 2020 IEEE Photonics Conference (IPC).
Publication Year :: 2020
Publisher :: IEEE, 2020.
Abstract: We fabricated a Ge 0.92 Sn 0.08 micro-disk laser with a lasing threshold as low as 20-30 kW/cm2 at 75 K. A specific etching process was developed to remove the dense array of misfit dislocations from the gain medium. Further surface treatments and passivations improved the lasing dynamics.