Abstract

A quantum-dot microdisk was optically pumped by continuous-wave excitation with a level sufficient for the ground-state lasing. The microdisk was additionally illuminated with sub-ps pulses of various powers. It was found that there is a critical level of pulse power that determines the subsequent transient process of the microlaser. Depending on the level of the pulsed excitation, the ground-state lasing intensity can be either enhanced (for weak pulses) or fully quenched (for strong pulses). In the latter case, the excited-state lasing is ignited for a short time. All dynamic phenomena occur on a time scale of the order of 100 ps, and the duration of the transient process as a whole (from the arrival of the excitation pulse to the restoration of steady-state intensities) lasts no more than 0.5 ns. Using this phenomenon, a microlaser can be rapidly switched between two states with the switching controlled by the level of the incoming optical pulse.

© 2024 Optica Publishing Group

Two-state lasing in a quantum dot racetrack microlaser

Ivan Makhov, Konstantin Ivanov, Eduard Moiseev, Anna Dragunova, Nikita Fominykh, Natalia Kryzhanovskaya, and Alexey Zhukov
Opt. Lett. 48(13) 3515-3518 (2023)

Intensity noise behavior of an InAs/InGaAs quantum dot laser emitting on ground states and excited states

R. Pawlus, L. L. Columbo, P. Bardella, S. Breuer, and M. Gioannini
Opt. Lett. 43(4) 867-870 (2018)

1.55  μm band low-threshold, continuous-wave lasing from InAs/InAlGaAs quantum dot microdisks

Si Zhu, Bei Shi, Yating Wan, Evelyn L. Hu, and Kei May Lau
Opt. Lett. 42(4) 679-682 (2017)

Intrinsic gain switching in optically injected quantum dot laser lasing simultaneously from the ground and excited state

Lukasz Olejniczak, Krassimir Panajotov, Sebastian Wieczorek, Hugo Thienpont, and Marc Sciamanna
J. Opt. Soc. Am. B 27(11) 2416-2423 (2010)

Highly efficient injection microdisk lasers based on quantum well-dots

Eduard Moiseev, Natalia Kryzhanovskaya, Mikhail Maximov, Fedor Zubov, Alexey Nadtochiy, Marina Kulagina, Yurii Zadiranov, Nikolay Kalyuzhnyy, Sergey Mintairov, and Alexey Zhukov
Opt. Lett. 43(19) 4554-4557 (2018)