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Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer

Atomic magnetometers (AMs) are widely acknowledged as one of the most sensitive kind of instruments for bio-magnetic field measurement. Recently, there has been growing interest in developing chip-scale AMs through nanophotonics and current CMOS-compatible nanofabrication technology, in pursuit of s...

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Autores principales: Hu, Jinsheng, Lu, Jixi, Liang, Zihua, Liu, Lu, Wang, Weiyi, Zhou, Peng, Ye, Mao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9313279/
https://www.ncbi.nlm.nih.gov/pubmed/35884332
http://dx.doi.org/10.3390/bios12070529
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author Hu, Jinsheng
Lu, Jixi
Liang, Zihua
Liu, Lu
Wang, Weiyi
Zhou, Peng
Ye, Mao
author_facet Hu, Jinsheng
Lu, Jixi
Liang, Zihua
Liu, Lu
Wang, Weiyi
Zhou, Peng
Ye, Mao
author_sort Hu, Jinsheng
collection PubMed
description Atomic magnetometers (AMs) are widely acknowledged as one of the most sensitive kind of instruments for bio-magnetic field measurement. Recently, there has been growing interest in developing chip-scale AMs through nanophotonics and current CMOS-compatible nanofabrication technology, in pursuit of substantial reduction in volume and cost. In this study, an integrated polarization-splitting grating coupler is demonstrated to achieve both efficient coupling and polarization splitting at the D1 transition wavelength of rubidium (795 nm). With this device, linearly polarized probe light that experienced optical rotation due to magnetically induced circular birefringence (of alkali medium) can be coupled and split into individual output ports. This is especially advantageous for emerging chip-scale AMs in that differential detection of ultra-weak magnetic field can be achieved through compact planar optical components. In addition, the device is designed with silicon nitride material on silicon dioxide that is deposited on a silicon substrate, being compatible with the current CMOS nanofabrication industry. Our study paves the way for the development of on-chip AMs that are the foundation for future multi-channel high-spatial resolution bio-magnetic imaging instruments.
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spelling pubmed-93132792022-07-26 Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer Hu, Jinsheng Lu, Jixi Liang, Zihua Liu, Lu Wang, Weiyi Zhou, Peng Ye, Mao Biosensors (Basel) Article Atomic magnetometers (AMs) are widely acknowledged as one of the most sensitive kind of instruments for bio-magnetic field measurement. Recently, there has been growing interest in developing chip-scale AMs through nanophotonics and current CMOS-compatible nanofabrication technology, in pursuit of substantial reduction in volume and cost. In this study, an integrated polarization-splitting grating coupler is demonstrated to achieve both efficient coupling and polarization splitting at the D1 transition wavelength of rubidium (795 nm). With this device, linearly polarized probe light that experienced optical rotation due to magnetically induced circular birefringence (of alkali medium) can be coupled and split into individual output ports. This is especially advantageous for emerging chip-scale AMs in that differential detection of ultra-weak magnetic field can be achieved through compact planar optical components. In addition, the device is designed with silicon nitride material on silicon dioxide that is deposited on a silicon substrate, being compatible with the current CMOS nanofabrication industry. Our study paves the way for the development of on-chip AMs that are the foundation for future multi-channel high-spatial resolution bio-magnetic imaging instruments. MDPI 2022-07-15 /pmc/articles/PMC9313279/ /pubmed/35884332 http://dx.doi.org/10.3390/bios12070529 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hu, Jinsheng
Lu, Jixi
Liang, Zihua
Liu, Lu
Wang, Weiyi
Zhou, Peng
Ye, Mao
Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer
title Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer
title_full Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer
title_fullStr Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer
title_full_unstemmed Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer
title_short Integrated Polarization-Splitting Grating Coupler for Chip-Scale Atomic Magnetometer
title_sort integrated polarization-splitting grating coupler for chip-scale atomic magnetometer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9313279/
https://www.ncbi.nlm.nih.gov/pubmed/35884332
http://dx.doi.org/10.3390/bios12070529
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