Shot-noise-limited optical polarimetry with spin-alignment and magnetism decoupling

Xing Heng; Xiaofei Huang; Weiyi Wang; Fan Wang; Dinghui Gong; Chang Liu; Guoqing Tian; Jie Zheng; Yueyang Zhai; Kai Wei

Results in Physics (Oct 2024)

Shot-noise-limited optical polarimetry with spin-alignment and magnetism decoupling

Xing Heng,
Xiaofei Huang,
Weiyi Wang,
Fan Wang,
Dinghui Gong,
Chang Liu,
Guoqing Tian,
Jie Zheng,
Yueyang Zhai,
Kai Wei

Affiliations

Xing Heng: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Xiaofei Huang: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Weiyi Wang: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Fan Wang: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Dinghui Gong: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Chang Liu: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Guoqing Tian: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Jie Zheng: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China
Yueyang Zhai: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China; Hefei National Laboratory, Hefei, 230088, Anhui, China
Kai Wei: School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hangzhou Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, Zhejiang, China; Hefei National Laboratory, Hefei, 230088, Anhui, China; Corresponding author.

Journal volume & issue: Vol. 65
p. 107960

Abstract

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Quantum non-demolition measurement with an off-resonance polarized probe is a widely utilized technique for atomic sensors. We observe previously unexplored spin-alignment polarization induced by the far-detuned off-resonance linear probe in an ultrasensitive optical polarimetry. The evolution of probe-generated multipole moments exacerbates probe noise due to strong magnetic couplings. We demonstrate a method to decouple spin-alignment from magnetic fields by manipulating the multipole moments in zero-fields. The probe noise is suppressed by 10 dB with the proposed method, achieving a noise floor at the standard quantum limit. The realized shot-noise-limited optical polarimetry holds significant promise for atomic sensors aimed at ultra-sensitivity.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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