InGaAsP Microdisk Lasers on Al O

InGaAsP microdisk lasers are fabricated on Al O by wafer fusion. Room-temperature continuous-wave operation with threshold pump power of 1.13 mW has been achieved from a 2.2- m diameter microdisk laser. The lasing wavelength with incident pump power redshifts at a rate of 0.28 nm/mW which shows the improved thermal characteristics due to the high thermal conductivity of Al O bottom layer.