Controlled photoluminescence in amorphous-silicon-nitride microcavities

Narrow-band and enhanced photoluminescence have been observed in hydrogenat ed amorphous-silicon-nitride microcavities. The distributed Bragg reflector s were fabricated using alternating layers of hydrogenated amorphous-silico n nitride and hydrogenated amorphous-silicon oxide. The microcavity resonan ce wavelength was designed to be at the maximum of the bulk hydrogenated am orphous-silicon-nitride luminescence spectrum. At the microcavity resonance , the photoluminescence amplitude is enhanced, while the photoluminescence linewidth is reduced with respect to the bulk hydrogenated amorphous-silico n nitride. (C) 2001 American Institute of Physics.