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• W2025681057 abstract "We study 1.3 µm diode lasers based on self-organized InAs quantum dots grown by molecular beam epitaxy on GaAs substrates. Overgrowing the InAs quantum dot array with a thin InGaAs layer allows us to achieve 1.3 µm emission and keep a sufficiently high surface density of quantum dots. Using transmission electron microscopy we show that the main reason for the long-wavelength PL shift in InAs/InGaAs quantum dots is non-uniform distribution of In in InGaAs leading to the increase in effective volume of a quantum dot. Long-stripe lasers showed low-threshold current density ( 50%) and low internal loss (~1-2 cm-1). The maximum output power for wide-stripe lasers was as high as 2.7 W and for single-mode devices 110 mW. The lasing wavelength for VCSELs was 1.3 µm. The threshold current for the device with the 8 µm aperture was 1.8 mA. The output power of 220 µW at a drive current of 2.4 mA was observed under pulsed mode." @default.
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• W2025681057 date "2000-11-14" @default.
• W2025681057 modified "2023-09-30" @default.
• W2025681057 title "Long-wavelength quantum dot lasers on GaAs substrates" @default.
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• W2025681057 doi "https://doi.org/10.1088/0957-4484/11/4/341" @default.
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