Silicon-based light emitters fabricated by embedding Ge self-assembled quantum dots in microdisks

Silicon-based light emitters have been fabricated on silicon-on-insulator substrates by embedding Ge self-assembled quantum dots in microdisk resonators. Strong room-temperature resonant luminescence is observed from the microdisks under optical pumping. Photoluminescence from Ge quantum dots is significantly enhanced by the microdisk resonators. Different kinds of cavity modes, whispering-gallery modes, and Fabry-Perot modes are observed in the wavelength range from 1.2 to 1.6 mu m for microdisks with different diameters. (c) 2007 American Institute of Physics.