Lebedev, D. V.; Mintairov, A. M.; Kulagina, M.M; Troshkov, S.I.; Kapaldo, J.; Merz, J.L.; Rouvimov, S.; Juska, Gediminas; Gocalińska, Agnieszka M.; Moroni, Stefano T.; Pelucchi, Emanuele

2016

Unknown

Journal of Physics: Conference Series

Lasing of InP/AlInAs quantum dots in AlInAs microdisk cavity

Published

()

690

1

012023

AlInAs microdisk cavities having quality factor Q ~ 15 000 were fabricated from lattice-matched InP/AlInAs (interface/aggregation) quantum dot (QD) structures using wet chemical etching. The QD emission coupled to whispering gallery modes was observed at spectral range 920 - 1000 nm at temperatures of 10 - 160 K. The laser generation with threshold power density of 50 W/cm 2 at T = 10 K was observed under optical pumping. It was found that the spontaneous emission coupling factor ß equals 0.23 for these microdisks. The low temperature lasing operation and the small coupling factors observed suggest the existence of small QDs formed at the InP/InAlAs interface as the main active elements.

1742-6596

http://stacks.iop.org/1742-6596/690/i=1/a=012023