Title :
A picotesla atomic magnetometer operating at normal temperature
Author :
Liu Qiang ; Zhang Junhai ; Zeng Xianjin ; Han Simiao ; Li Jiuxing ; Li Qingmeng ; Huang Qiang ; Huang Zongjun ; Sun Weimin
Author_Institution :
Harbin Eng. Univ., Harbin, China
Abstract :
The basic principle of atomic magnetometer is to measure the precession frequency of polarized atomic spins in a magnetic field. The paper describes the optical pump, probe process and spin relaxation mechanisms. The magnetometer based on Cs atom is demonstrated in the experiment. At normal temperature 30°C the magnetometer achieves 8nT magnetic resonance widths and magnetic field sensitivity of 4.8pT/Hz1/2. It is more convenient for miniature structure design due to operate in lower temperature.
Keywords :
atomic structure; caesium; magnetometers; relaxation; spin; Cs; magnetic field; normal temperature; optical pump; picotesla atomic magnetometer; polarized atomic spins; precession frequency measurement; probe process; spin relaxation mechanisms; Laser excitation; Magnetic resonance; Magnetometers; Perpendicular magnetic anisotropy; Saturation magnetization; Superconducting magnets; Cs atom; atomic magnetometry; spin relaxation;
Conference_Titel :
Optoelectronics and Microelectronics Technology (AISOMT), 2011 Academic International Symposium on
Conference_Location :
Harbin
Print_ISBN :
978-1-4577-0794-0
DOI :
10.1109/AISMOT.2011.6159341
