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Spectral decomposition at complex laser polarization configuration |
| Yang Hai-Feng (杨海峰), Gao Wei (高伟), Cheng Hong (成红), Liu Hong-Ping (刘红平) |
| State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences, Wuhan 430071, China |
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Abstract We study the role of laser polarization in the diamagnetic spectrum for the transition from the ground state to the highly excited Rydberg states through a single photon absorption. For simplicity, one usually polarizes the irradiation laser to the selected main quantum axis, which is along the applied external electric or magnetic field. The transition selection rule is simply expressed as Δm=0, which corresponds to the π transition. When the polarization is circularly polarized around the main axis, the σ+ or σ- transition occurs, corresponding to the selection rule of Δm=1 or Δm=-1, respectively. A slightly more complex case is that the laser is linearly polarized perpendicular to the main axis. The numerical calculation shows that we can decompose the transition into the sum of σ+ and σ- transitions, it is noted as the σ transition. For the more complex case in which the laser is linearly polarized with an arbitrary angle with respect to the main axis, we have to decompose the polarization into one along the main axis and the other one perpendicular to the main axis. They correspond to π and σ transitions, respectively. We demonstrate that these transitions in the diamagnetic spectrum and the above spectral decomposition well explain the experimentally observed spectra.
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Received: 21 October 2012
Revised: 26 November 2012
Accepted manuscript online:
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PACS:
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32.60.+i
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(Zeeman and Stark effects)
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32.30.Jc
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(Visible and ultraviolet spectra)
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31.15.-p
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(Calculations and mathematical techniques in atomic and molecular physics)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11174329 and 91121005) and the National Basic Research Program of China (Grant No. 2013CB922003). |
Corresponding Authors:
Liu Hong-Ping
E-mail: liuhongping@wipm.ac.cn
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Cite this article:
Yang Hai-Feng (杨海峰), Gao Wei (高伟), Cheng Hong (成红), Liu Hong-Ping (刘红平) Spectral decomposition at complex laser polarization configuration 2013 Chin. Phys. B 22 053201
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