Abstract
The peculiarities of two-state lasing in a racetrack microlaser with an InAs/GaAs quantum dot active region are investigated by measuring the electroluminescence spectra at various injection currents and temperatures. Unlike edge-emitting and microdisk lasers, where two-state lasing involves the ground and first excited-state optical transitions of quantum dots, in racetrack microlasers, we observe lasing through the ground and second excited states. As a result, the spectral separation between lasing bands is doubled to more than 150 nm. A temperature dependence of threshold currents for lasing via ground and second excited states of quantum dots was also obtained.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Alexey Zhukov, Alexey Nadtochiy, Alexey Karaborchev, Nikita Fominykh, Ivan Makhov, Konstantin Ivanov, Yulia Guseva, Marina Kulagina, Sergey Blokhin, and Natalia Kryzhanovskaya
Opt. Lett. 49(2) 330-333 (2024)
Si Zhu, Bei Shi, Yating Wan, Evelyn L. Hu, and Kei May Lau
Opt. Lett. 42(4) 679-682 (2017)
Subitan Laskar, Athrey C Dakshinamurthy, Sivakumar Chithamallu, C. Sudarshan, and C. Sudakar
Opt. Lett. 48(10) 2643-2646 (2023)