FAI CHEUNG , Yuk

Optically pumped whispering-gallery mode (WGM) lasing is observed from a thin-film GaN microdisk processed from GaN-on-Si InGaN/GaN multi-quantum well wafers by selective wet-etch removal of the substrate. Compared with thin-film microdisks processed from GaN-on-sapphire wafers through laser lift-off of the sapphire substrate, the exposed...

Optically-pumped whispering-gallery mode (WGM) lasing is observed from thin-film GaN microdisk processed from GaN-on-Si InGaN/GaN multi-quantum well wafers by selective wet etch removal of the substrate. Compared to thinfilm microdisks processed from GaN-onsapphire wafers through laser lift-off of the sapphire substrate, the exposed surface is...