Effect of external magnetic field on the coherence properties of degenerated two-level atomic system

Zhao, Jianming; Wang, Lirong; Zhao, Yanting; Ma, Jie; Liu, Xiao; Shi, Jia

doi:10.7498/aps.54.5093

Acta Phys. Sin.

2005

DOI: 10.7498/aps.54.5093

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Effect of external magnetic field on the coherence properties of degenerated two-level atomic system

Jianming Zhao¹,

Lirong Wang²,

Yanting Zhao³

et al.

Abstract: The electromagnatically induced absorption (EIA) is obtained in degenerated cycled cesium atomic two-level transition of 6S1/2F=4—6P3/2F'=5. The effect of the magnetic field on coherence of the atom is also investigated experimentally. When external magnetic field is applied, the mixed structure of electromagnetically induced absorption and transparency is obtained in the transition of 6S1/2F=4—6P3/2F'=5. The experimental results are in agreement with theoretical analysis of C.Y. Ye et al. (2002).

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Electromagnetically induced grating based on the coherent population trapping

Song¹,

Ping²,

Zhan-Yu³

et al. 2013

Acta Phys. Sin.

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Based on the coherent population trapping theory, a new physical model of the electromagnetically induced grating (EIG) is proposed. Analytical expression of the dielectric susceptibility is derived using this model. Owing to the atomic coherence, introduced by the coherent population trapping, three regions of dielectric susceptibility, i.e., a gain region, a region with no absorption and high-refraction index, and a dark region, are formed. Based on this model and the energy level of 87Rb, a novel scheme to implement the diffraction grating is proposed. Moreover, theoretical analysis and calculation of this grating are carried out. The results show that in the region with no absorption and high refractive index, the grating presents a pure phase grating and the first-order diffraction intensity can reach 0.4. In the gain region, however, the grating is a combination of phase grating and amplitude grating, and at its largest-gain point, the maximum of the first-order diffraction efficiency arrives at 1.26, and the second-order diffraction efficiency can also increase to 0.31.

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Electromagnetically induced grating based on the coherent population trapping

Song¹,

Ping²,

Zhan-Yu³

et al. 2013

Acta Phys. Sin.

View full text Add to dashboard Cite

show abstract

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Effect of external magnetic field on the coherence properties of degenerated two-level atomic system

Cited by 1 publication

References 0 publications

Electromagnetically induced grating based on the coherent population trapping

Electromagnetically induced grating based on the coherent population trapping

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