Td. Lee et al., MODE EMISSION CHARACTERISTICS OF SEMICONDUCTOR MICRODISK AND MICRORING LASERS, Optical and quantum electronics, 28(10), 1996, pp. 1335-1341
We fabricate both microdisc and microring InGaAsP-InGaAs quantum well
semiconductor lasers using an etching-and-bonding technique. Their emi
ssion properties are studied by optical pumping at 77 K. Single mode l
asing is achieved for discs with a diameter of 5 mu m. Multimode emiss
ion is observed for rings with larger diameters. Both fundamental and
higher order lasing modes are observed and are found to exhibit intere
sting emission characteristics.