Spin dynamics of magnetic resonance with parametric modulation in a potassium vapor cell
A typical magnetic-resonance scheme employs a static bias magnetic field and an orthogonal driving magnetic field oscillating at the Larmor frequency, at which the atomic polarization precesses around the static magnetic field. Here we demonstrate both theoretically and experimentally the variations...
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| Published in | Chinese physics B Vol. 26; no. 3; pp. 285 - 290 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.03.2017
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| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 |
| DOI | 10.1088/1674-1056/26/3/030701 |
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| Summary: | A typical magnetic-resonance scheme employs a static bias magnetic field and an orthogonal driving magnetic field oscillating at the Larmor frequency, at which the atomic polarization precesses around the static magnetic field. Here we demonstrate both theoretically and experimentally the variations of the resonance condition and the spin precession dynamics resulting from the parametric modulation of the bias field. We show that the driving magnetic field with the frequency detuned by different harmonics of the parametric modulation frequency can lead to resonance as well. Also, a series of frequency sidebands centered at the driving frequency and spaced by the parametric modulation frequency can be observed in the precession of the atomic polarization. We further show that the resonant amplitudes of the sidebands can be controlled by varying the ratio between the amplitude and the frequency of the parametric modulation. These effects could be used in different atomic magnetometry applications. |
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| Bibliography: | Rui Zhang1,2, Zhi-Guo Wang1,3, Xiang Peng2, Wen-Hao Li2, Song-Jian Li2, and Hong Guo1,2（1 College of Science, and Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha 410073, China 2 State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, and Center for Quantum Information Technology, Peking University, Beijing 100871, China 3 College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China） 11-5639/O4 A typical magnetic-resonance scheme employs a static bias magnetic field and an orthogonal driving magnetic field oscillating at the Larmor frequency, at which the atomic polarization precesses around the static magnetic field. Here we demonstrate both theoretically and experimentally the variations of the resonance condition and the spin precession dynamics resulting from the parametric modulation of the bias field. We show that the driving magnetic field with the frequency detuned by different harmonics of the parametric modulation frequency can lead to resonance as well. Also, a series of frequency sidebands centered at the driving frequency and spaced by the parametric modulation frequency can be observed in the precession of the atomic polarization. We further show that the resonant amplitudes of the sidebands can be controlled by varying the ratio between the amplitude and the frequency of the parametric modulation. These effects could be used in different atomic magnetometry applications. atomic magnetometer, magnetic resonance, parametric modulation |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/26/3/030701 |