Кафедра фізико-математичних наук

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High-Performance Multiwavelength GaNAs Single Nanowire Lasers
(2024) Jansson, Mattias; Nosenko, Valentyna; Torigo, Yuto; Nakama, Kaito; Yukimune, Mitsuki; Higo, Akio; Ishikawa, Fumitaro; Chen, Weimin; Buyanova, Irina
In this study, we report a significant enhancement in the performance of GaNAs-based single nanowire lasersthrough optimization of growth conditions, leading to a lowerlasing threshold and higher operation temperatures. Ouranalysis reveals that these improvements in the laser performance can be attributed to a decrease in the density of localizedstates within the material. Furthermore, we demonstrate thatowing to their excellent nonlinear optical properties, thesenanowires support selffrequency conversion of the stimulatedemission through second harmonic generation (SHG) and sumfrequency generation (SFG), providing coherent light emissionin the cyan-green range. Mode-specific differences in the self-conversion efficiency are revealed and explained by differencesin the light extraction efficiency of the converted light caused by the electric field distribution of the fundamental modes. Ourwork, therefore, facilitates the design and development of multiwavelength coherent light generation and higher-temperatureoperation of GaNAs nanowire lasers, which will be useful in the fields of optical communications, sensing, and nanophotonics