High Quality Direct Photo-Patterned Microdisk Lasers With Organic–Inorganic Hybrid Materials

A direct photo-patterned microdisk-on-chip technique is used to fabricate 2-D microdisk lasers with various shapes. High-Q morphology-dependent resonances (including whispering gallery modes and four bouncing reflection modes) laser emissions from RhB-doped circular and square-shaped microdisks are observed. A thin polymer cladding on the microdisk is found to obviously smooth the disk sidewall. As a result, lowered lasing threshold, increased Q-value as high as 12000 and efficient suppression of h igh-order modes are realized. Lasing from square-shaped microcavities shows closed and open orbit resonances separately at different emission directions.