التفاصيل البيبلوغرافية
| العنوان: |
Metasurface-integrated elliptically polarized laser-pumped SERF magnetometers. |
| المؤلفون: |
Liang, Zihua, Hu, Jinsheng, Zhou, Peng, Liu, Lu, Hu, Gen, Wang, Ankang, Ye, Mao |
| المصدر: |
Microsystems & Nanoengineering; 7/19/2024, Vol. 10 Issue 1, p1-10, 10p |
| مصطلحات موضوعية: |
MAGNETOMETERS, OPTIMIZATION algorithms, SILICON nitride, BIOMAGNETISM, MAGNETOCARDIOGRAPHY, BIO-imaging sensors, MAGNETOENCEPHALOGRAPHY |
| مستخلص: |
The emergence of biomagnetism imaging has led to the development of ultrasensitive and compact spin-exchange relaxation-free (SERF) atomic magnetometers that promise high-resolution magnetocardiography (MCG) and magnetoencephalography (MEG). However, conventional optical components are not compatible with nanofabrication processes that enable the integration of atomic magnetometers on chips, especially for elliptically polarized laser-pumped SERF magnetometers with bulky optical systems. In this study, an elliptical-polarization pumping beam (at 795 nm) is achieved through a single-piece metasurface, which results in an SERF magnetometer with a high sensitivity reaching 10.61 fT/Hz1/2 by utilizing a 87Rb vapor cell with a 3 mm inner diameter. To achieve the optimum theoretical polarization, our design combines a computer-assisted optimization algorithm with an emerging metasurface design process. The metasurface is fabricated with 550 nm thick silicon-rich silicon nitride on a 2 × 2 cm2 SiO2 substrate and features a 22.17° ellipticity angle (a deviation from the target polarization of less than 2%) and more than 80% transmittance. This study provides a feasible approach for on-chip polarization control of future all-integrated atomic magnetometers, which will further pave the way for high-resolution biomagnetism imaging and portable atomic sensing applications. [ABSTRACT FROM AUTHOR] |
|
Copyright of Microsystems & Nanoengineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Springer Verlag. 
Full Text Finder