Abstract
The efficiency of photon collection from optically active defect centers in bulk diamond is greatly reduced by refraction 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−)(NV−) within a 5 μm5 μm diameter SIL compared with NV−NV−’s under a planar surface in the same crystal. Such a system is potentially scalable and easily adaptable to other defect centers in bulk diamond.
Original language | English |
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Article number | 241901 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 97 |
DOIs | |
Publication status | Published - 13 Dec 2010 |
Keywords
- photon collection
- diamond
- defect centers