Abstract:
Microdisk injection lasers on GaAs substrates, with a minimum diameter of 15 $\mu$m and an active region based on InAs/InGaAs quantum dots, are fabricated. The lasers operate in the continuous-wave mode at room temperature without external cooling. The lasing wavelength is around 1.27 $\mu$m at a minimum threshold current of 1.6 mA. The specific thermal resistance is estimated to be 5 $\times$ 10$^{-3\circ}$Ñ cm$^{2}$/W.