Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond
We designed a nanoscale light extractor (NLE) for efficient outcoupling and beaming of broadband light emitted by shallow, negatively charged nitrogen-vacancy (NV) centers in bulk diamond. The NLE consists of a patterned silicon layer on diamond and requires no etching of the diamond surface. Our de...
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Zusammenfassung: | We designed a nanoscale light extractor (NLE) for efficient outcoupling and
beaming of broadband light emitted by shallow, negatively charged
nitrogen-vacancy (NV) centers in bulk diamond. The NLE consists of a patterned
silicon layer on diamond and requires no etching of the diamond surface. Our
design process is based on adjoint optimization using broadband time-domain
simulations and yields structures that are inherently robust to positioning and
fabrication errors. Our NLE functions like a transmission antenna for the NV
center, enhancing the optical power extracted from an NV center positioned 10
nm below the diamond surface by a factor of more than 35, and beaming the light
into a +/-30{\deg} cone in the far field. This approach to light extraction can
be readily adapted to other solid-state color centers. |
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DOI: | 10.48550/arxiv.2007.04545 |