Strongly enhanced photon collection from diamond defect centres under micro-fabricated integrated solid immersion lenses
Abstract
The efficiency of collecting photons from optically active defect centres in bulk diamond is greatly reduced by refraction and reflection at the diamond-air interface. We report on the fabrication and measurement of a geometrical solution to the problem; integrated solid immersion lenses (SILs) etched directly into the surface of diamond. An increase of a factor of 10 was observed in the saturated count-rate from a single negatively charged nitrogen-vacancy (NV-) within a 5um diameter SIL compared with NV-s under a planar surface in the same crystal. A factor of 3 reduction in background emission was also observed due to the reduced excitation volume with a SIL present. Such a system is potentially scalable and easily adaptable to other defect centres in bulk diamond.
Cite
@article{arxiv.1006.2093,
title = {Strongly enhanced photon collection from diamond defect centres under micro-fabricated integrated solid immersion lenses},
author = {J. P. Hadden and J. P. Harrison and A. C. Stanley-Clarke and L. Marseglia and Y-L. D. Ho and B. R. Patton and J. L. O'Brien and J. G. Rarity},
journal= {arXiv preprint arXiv:1006.2093},
year = {2011}
}
Comments
5 Pages, 5 figures (4 subfigures) - corrected typo