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Manipulation of Spontaneous Emission via Quantum Interference in an elliptically polarized laser field

Communications in Theoretical Physics 2013年第5期59卷 603-614页

作者：丁春玲李家华余荣张多杨晓雪 School of Physics and Electronics Henan University Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology School of Science Hubei Province Key Laboratory of Intelligent RobotWuhan Institute of Technology

Manipulation of spontaneous emission from an atom confined in three kinds of modified reservoirs has been investigated by means of an elliptically polarized laser field. Some interesting phenomena such as the multi-peak structure, extreme spectral narrowing, and cancellation of spontaneous emission can be observed by adjusting controllable system parameters. Moreover, these phenomena depend on the constructive or destructive quantum interference between multiple decay channels and which can be changed appreciably by varying the phase difference between the two circularly polarized components of the probe field. These results demonstrate the importance of an elliptially polarized laser field in controlling the spontaneous emission and its potential applications in high-precision spectroscopy.

关键词： spontaneous emission elliptically polarized laser field quantum interference

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Decoding the electron dynamics in high-order harmonic generation from asymmetric molecular ions in elliptically polarized laser fields

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Chinese Physics B 2022年第4期31卷 287-292页

作者： Cai-Ping Zhang Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031China Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityTaiyuan 030031China

The high-order harmonic generation from an asymmetric molecular ion is theoretically investigated based on the Born-Oppenheimer model with two-dimensional electron *** is shown that the harmonic intensity changes periodically in elliptically polarized laser *** periodical character is *** establishing the physical image,the periodicity of the harmonic intensity can be ascribed to the contributions of the ground state and the excited ***,the electron dynamics from different electronic states can be selected via combining the elliptically polarized laser field with a static electric *** harmonics dominated either by ground state or excited state are emitted once in an optical cycle in the combined laser field.

关键词： asymmetric molecular ion high-order harmonic generation electron dynamics elliptically polarized laser field

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