Enhanced spontaneous emission at 1.55μm from colloidal PbSe quantum dots in a Si photonic crystal microcavity

• DOI: 10.1063/1.2731657
• Publication Date: 2007-04-24T22:18:34Z
• Authors: Z. Wu; Z. Mi; P. Bhattacharya; T. Zhu; J. Xu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

The authors report on the design, fabrication, and characterization of 1.55μm Si-based photonic crystal microcavity light emitters utilizing PbSe quantum dots. Efficient coupling of emission from PbSe quantum dots to Si photonic crystal membrane microcavity is achieved by inserting the quantum dots in a central air hole in the microcavity. Enhancement of spontaneous emission with linewidth of ∼2.0nm is observed at 1550nm at room temperature. The Purcell factor and the spontaneous emission coupling factor are estimated to be 35 and 0.04, respectively.