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arXiv · 2404.02102

Atomic magnetometry using a metasurface polarizing beamsplitter in silicon on sapphire

Xuting Yang·Pritha Mukherjee·Minjeong Kim·Hongyan Mei·Chengyu Fang·Soyeon Choi·Yuhan Tong·Sarah Perlowski·David A. Czaplewski·Alan M. Dibos·Mikhail A. Kats·Jennifer T. Choy
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Abstract

We demonstrate atomic magnetometry using a metasurface polarizing beamsplitter fabricated on a silicon-on-sapphire (SOS) platform. The metasurface splits a beam that is near-resonant with the rubidium atoms (795 nm) into orthogonal linear polarizations, enabling measurement of magnetically sensitive circular birefringence in a rubidium vapor through balanced polarimetry. We incorporated the metasurface into an atomic magnetometer based on nonlinear magneto-optical rotation and measured sub-nanotesla sensitivity, which is limited by low-frequency technical noise and transmission loss through the metasurface. To our knowledge, this work represents the first demonstration of SOS nanophotonics for atom-based sensing and paves the way for highly integrated, miniaturized atomic sensors with enhanced sensitivity and portability.

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Xuting Yang, Pritha Mukherjee, Minjeong Kim, Hongyan Mei, Chengyu Fang, Soyeon Choi, Yuhan Tong, Sarah Perlowski, David A. Czaplewski, Alan M. Dibos, Mikhail A. Kats, Jennifer T. Choy. 2024-04-02. Atomic magnetometry using a metasurface polarizing beamsplitter in silicon on sapphire. https://arxiv.org/abs/2404.02102

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