Grating-patterned hyperbolic metamaterials for InGaN/GaN nanowire quantum dots single photon source

Oue to the wide adjustable range of bandgap and large exciton binding energy, InGaN/GaN nanowire quantum dots (NQDs) has been one of the most promising candidates for site-controlled single photon source (SPS) in a wide range from visible to near-infrared. Here the annular-grating-patterned hyperbolic metamaterials was proposed to enhance the performance of InGaN/GaN NQDs SPS. By combining the broadband enhancement of spontaneous emission from hyperbolic metamaterials and directional light output from annular grating, both the spontaneous emission rate and photon extraction efficiency can be enhanced. Our research provides a novel idea for high-frequency, high-brightness and directional InGaN/GaN NQDs SPS, which has good prospect for many applications such as quantum information processing.