Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond

• URL: http://arxiv.org/abs/2007.04545v2
• Date: Wed, 7 Oct 2020 22:37:43 GMT
• Title: Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond
• Authors: Raymond A. Wambold, Zhaoning Yu, Yuzhe Xiao, Benjamin Bachman, Gabriel Jaffe, Shimon Kolkowitz, Jennifer T. Choy, Mark A. Eriksson, Robert J. Hamers, Mikhail A. Kats
• Abstract summary: nanoscale light extractor (NLE) for efficient outcoupling and beaming of broadband light emitted by shallow, negatively charged nitrogen-vacancy centers in bulk diamond. NLE consists of a patterned silicon layer on diamond and requires no etching of the diamond surface.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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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