Current- and light-controlled switching of lasing wavelengths in InAs/InGaAs/GaAs quantum dot lasers for application in neuromorphic photonics

M. V. Maksimov^a, F. I. Zubov^a, A. A. Bekman^b, G. O. Kornyshov^b, N. Yu. Gordeev^b, A. A. Kharchenko^a, O. I. Simchuk^a, N. A. Kalyuzhnyy^b, Yu. M. Shernyakov<sup>b

a</sup> Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg
^b Ioffe Institute, St. Petersburg

Abstract: Influence of the optical pumping by light with wavelength of 1260 nm on the spectra of lasers, based on InAs/GaAs quantum dots operating on the ground state (1260 nm), the excited state (1180 nm), as well as on the both of these states simultaneously (two-state lasing) was investigated. Pumping by the ground state radiation does not change the lasing mode of the devices, which also emit on ground state, but results in a suppression of the excited state lasing. The greater lasing intensity via the excited state, the greater optical injection power is required to suppress it.

Keywords: laser, two-state lasing, quantum dots.

Received: 22.07.2025
Revised: 05.08.2025
Accepted: 05.08.2025

DOI: 10.61011/PJTF.2025.21.61528.20450

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