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arXiv · 2007.04545

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

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
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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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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. 2020-07-09. Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond. https://arxiv.org/abs/2007.04545

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