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

Nanophotonics

article

Raymond A. Wambold¹  Shimon Kolkowitz²  Jennifer T. Choy¹  Mark A. Eriksson²  Robert J. Hamers⁵  Mikhail A. Kats¹  Zhaoning Yu¹  Yuzhe Xiao¹  Benjamin Bachman⁵  Gabriel Jaffe² 

[1] Department of Electrical and Computer Engineering, University of Wisconsin;Department of Physics, University of Wisconsin;Department of Engineering Physics, University of Wisconsin;Department of Materials Science and Engineering, University of Wisconsin;Department of Chemistry, University of Wisconsin

关键词: adjoint optimization;    color center;    inverse design;    Purcell enhancement;    quantum sensing;    topological optimization;   

DOI  :  10.1515/nanoph-2020-0387

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

We designed a nanoscale light extractor (NLE) for the 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° cone in the far field. This approach to light extraction can be readily adapted to other solid-state color centers.

【 授权许可】

CC BY