Atomic magnetometry using a metasurface polarizing beamsplitter in silicon on sapphire

• URL: http://arxiv.org/abs/2404.02102v1
• Date: Tue, 2 Apr 2024 16:56:40 GMT
• Title: Atomic magnetometry using a metasurface polarizing beamsplitter in silicon on sapphire
• Authors: 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,
• Abstract summary: We demonstrate atomic magnetometry using a metasurface polarizing beamsplitter fabricated on a silicon-on-sapphire (SOS) platform. We incorporated the metasurface into an atomic magnetometer based on nonlinear magneto-optical rotation and measured sub-nanotesla sensitivity.
• Score: 1.3888316663994498
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• 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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