GaInAsP/InP CBH Surface-Emitting Laser with a Dielectric Multilayer Reflector

Abstract
The threshold current of a GaInAsP/InP surface-emitting (SE) injection laser has been reduced to 15 mA (CW) at 77 K. The diameter of circular buried mesa was made smaller (∼18 µmφ), and a 5-pair SiO2/TiO2 dielectric multilayer reflector was introduced to a circular buried heterostructure (CBH) SE laser. The threshold exhibited the lowest value ever obtained.