The Influence of a Single Quantum Dot State on the Characteristics of a Microdisk Laser
Z G. Xie, S Gotzinger, W Fang, H Cao, Glenn S. Solomon
We report a quantum dot microcavity laser with a cw sub- W lasing threshold. In the region below threshold, the Q initially degrades with increasing pump power, after which saturation occurs and the Q recovers and exceeds the spectrometer resolution. We associate the initial Q spoiling with the QD state broadening that occurs with increasing pump power. For a 1.8 m diameter microdisk, the Q before lasing typically exceeds 15000. While lasing occurs under a variety of conditions, significant reduction of the lasing threshold is observed when an individual QD state is aligned with the cavity.
Physical Review Letters
lasing, microcavity, quantum electrodynamics, semiconductor, single quantum dot
, Gotzinger, S.
, Fang, W.
, Cao, H.
and Solomon, G.
The Influence of a Single Quantum Dot State on the Characteristics of a Microdisk Laser, Physical Review Letters
(Accessed December 8, 2023)