Low threshold distributed Bragg reflector surface emitting laser diode with semiconductor air-bridge-supported top mirror

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Abstract
A surface emitting laser diode (SELD) with two distributed Bragg reflectors (DBR) and semiconductor multilayer airbridge-supported top mirror is fabricated. A low threshold current of 1.5 mA is achieved under room temperature CW operation. The spectrum shows a strong peak at 891 nm with a FWHM of 10 Å. With light emission from the top Bragg reflector instead of from the back side of the substrate, laser arrays are easily formed with this novel structure.