Circular grating for extracting single photons from a quantum dot. For optimal performance, the quantum dot must be located at the centre of the grating.
Copyright: Image courtesy of NIST
Related Links:
• L. Sapienza, M. Davanço, A. Badolato and K. Srinivasan. Nanoscale optical positioning of single quantum dots for bright and pure single-photon emission. Nature Communications, 6, 7833 doi:10.1038/ncomms8833...