Nano Express

Nanoscale Research Letters

, Volume 5, Issue 3, pp 608-612

Open Access This content is freely available online to anyone, anywhere at any time.

Cavity Enhancement of Single Quantum Dot Emission in the Blue

  • Robert A. TaylorAffiliated withClarendon Laboratory, Department of Physics, University of Oxford Email author 
  • , Anas F. JarjourAffiliated withClarendon Laboratory, Department of Physics, University of Oxford
  • , Daniel P. CollinsAffiliated withClarendon Laboratory, Department of Physics, University of Oxford
  • , Mark J. HolmesAffiliated withClarendon Laboratory, Department of Physics, University of Oxford
  • , Rachel A. OliverAffiliated withDepartment of Materials Science and Metallurgy, University of Cambridge
  • , Menno J. KappersAffiliated withDepartment of Materials Science and Metallurgy, University of Cambridge
  • , Colin J. HumphreysAffiliated withDepartment of Materials Science and Metallurgy, University of Cambridge

Abstract

Cavity-enhanced single-photon emission in the blue spectral region was measured from single InGaN/GaN quantum dots. The low-Q microcavities used were characterized using micro-reflectance spectroscopy where the source was the enhanced blue output from a photonic crystal fibre. Micro-photoluminescence was observed from several cavities and found to be ~10 times stronger than typical InGaN quantum dot emission without a cavity. The measurements were performed using non-linear excitation spectroscopy in order to suppress the background emission from the underlying wetting layer.

Keywords

InGaN Quantum dot Single-photon source Microcavity