Y. Qian et al., LOW-THRESHOLD PROTON-IMPLANTED 1.3-MU-M VERTICAL-CAVITY TOP-SURFACE-EMITTING LASERS WITH DIELECTRIC AND WAFER-BONDED GAAS-ALAS BRAGG MIRRORS, IEEE photonics technology letters, 9(7), 1997, pp. 866-868
We demonstrate a new structure for long-wavelength (1.3-mu m) vertical
-cavity top-surface-emitting lasers using proton implantation for curr
ent confinement, Wafer-bonded GaAs-AlAs Bragg mirrors and dielectric m
irrors are used for bottom and top mirrors, respectively, The gain med
ium of the lasers consists of nine strain-compensated AlGaInAs quantum
wells, A record low room temperature pulsed threshold current density
of 1.13 kA/cm(2) has been achieved for 15-mu m diameter devices with
a threshold current of 2 mA, The side-mode-suppression-ratio is greate
r than 35 dB.