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July 9, 2026
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Two-state lasing in a quantum dot racetrack microlaser

Optics Letters. 2023. Vol. 48. No. 13. P. 3515–3518.
Makhov I., Ivanov K., Moiseev E., Dragunova A., Fominykh N., Kryzhanovskaya N., Zhukov A.

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.

Research target: Physics Nanotechnologies
Language: English
Full text
DOI
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Keywords: квантовые точкиquantum dotsполупроводниковый лазер Diode laserstwo-state lasingдвухуровневая генерация
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