Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

三能级Λ-型原子系统探测、泵浦光场频率调制效应研究

韩定安, 曾亚光

Published Dec 1, 2006• 0 citations
OpenAlex

Abstract

The effects of the frequency modulation of the probing and coupling light-fields are discussed in a three energy-level Λ-system. By adjusting the modulation frequency and the index of the modulation properly, we can draw a conclusion that the number of particles trapped changes regularly with time. In certain conditions the susceptibility of the system in the steady state is given.

Related papers

Frequency modulation of probing and coupling light-fields in three energy-level Λ-type atomic system

Yaguang Zeng

The effects of the frequency modulation of the probing and coupling light-fields are discussed in a three energy-level Λ-system. By adjusting the modulation frequency and the index of the modulation properly, we can draw a conclusion that the number of particles trapped changes regularly with time.In certain conditions the susceptibility of the system in the steady state is given.

Journal of Foshan University•Jan 1, 2006•0 citations

The frequency modulation effects of the probe field in three level Λ-system

Han Ding-An, Hong Guo, Hui Sun +2 more

In this paper, the frequency modulation effect of the probe field in a three-level Λ system is discussed. According to the classical equation of motion for the electron, the dielectric susceptibility of the medium is not affected by frequency modulation. Based on the quantum theory and the frequency modulation term expanded in terms of Bessel functions, the effects of the frequency modulation of the probe field on the system are studied, in which, when the modulation frequency of the probe field is large enough, the periodical population evolutions exist in three levels. Meanwhile, the stationary susceptibility of the probe field is given.

Acta Physica Sinica•Jan 1, 2004•0 citations

Third-order optical mixing of frequencies of a strong bichromatic field interacting with a three-level atom in the “Lambda” configuration

Constantine Mavroyannis

Optics Communications•Jul 1, 1983•4 citations

Achieving colossal Kerr nonlinearity via multiphoton atomic coherence in a five-level Λ − Ξ system

Amanjot Kaur, Sandeep Kumar, Paramjit Kaur

Abstract We propose to utilize a five-level Λ − Ξ system to achieve large self-Kerr nonlinearity under multiphoton resonance conditions. Using a density matrix formulation along with an iterative perturbation technique, analytic expressions of linear and nonlinear susceptibilities are derived for stationary as well as for moving atoms. Variation of first- and third-order susceptibilities with respect to frequency and intensity of switching field is then discussed. The dressed-state picture is employed to explain the amplitude and position of each peak in linear and nonlinear absorption profiles. It is found that under slow light conditions, large controllable Kerr nonlinearity with reduced linear and nonlinear absorption is achieved by properly adjusting the strength and detunings of strong electromagnetic (e.m.) fields. Our numerical results also reveal that the Kerr nonlinear index of our considered system is greater than that of existing three-level Λ and four-level N systems. Finally, it is substantiated that self-Kerr nonlinearity is proliferated by taking the Doppler effect into account.

Physica Scripta•Apr 26, 2019•5 citations

Non-stationary coherent population trapping in frequency-modulated fields

Vladimir Leonardovich Derbov, Alexey S. Lyubimov

Coherent population trapping (CPT) resonance formation is modeled numerically in a three-level Λ -system with one of the near-resonance fields being frequency-modulated. The model is based on density matrix equations in RW approximation with atomic relaxation properly taken into account. Slow modulation is shown to be equivalent to CW excitation with the frequency changed point by point. As the modulation period approaches the relaxation times, the delayed response of the system is shown to cause the CPT resonance shift and reshaping, as well as the appearance of transient oscillations of the energy level populations.

CAOL . International Conference on Advanced Optoelectronics and Lasers•Sep 1, 2010•0 citations

Non-perturbative time-dependent numerical simulation for electromagnetically induced transparency and slow light in three-level Λ-type atoms

Ming-Che Wu, W.-C. Liu

Computer Physics Communications•Jul 12, 2010•2 citations
The effects of the frequency modulation of the probing and coupling light-fields are discussed in a three energy-level Λ-system. By adjusting the modulation frequency and the index of the modulation properly, we can draw a conclusion that the number of particles trapped changes regularly with time. In certain conditions the susceptibility of the system in the steady state is given.
In this paper, the frequency modulation effect of the probe field in a three-level Λ system is discussed. According to the classical equation of motion for the electron, the dielectric susceptibility of the medium is not affected by frequency modulation. Based on the quantum theory and the frequency modulation term expanded in terms of Bessel functions, the effects of the frequency modulation of the probe field on the system are studied, in which, when the modulation frequency of the probe field is large enough, the periodical population evolutions exist in three levels. Meanwhile, the stationary susceptibility of the probe field is given.
Abstract We propose to utilize a five-level Λ − Ξ system to achieve large self-Kerr nonlinearity under multiphoton resonance conditions. Using a density matrix formulation along with an iterative perturbation technique, analytic expressions of linear and nonlinear susceptibilities are derived for stationary as well as for moving atoms. Variation of first- and third-order susceptibilities with respect to frequency and intensity of switching field is then discussed. The dressed-state picture is employed to explain the amplitude and position of each peak in linear and nonlinear absorption profiles. It is found that under slow light conditions, large controllable Kerr nonlinearity with reduced linear and nonlinear absorption is achieved by properly adjusting the strength and detunings of strong electromagnetic (e.m.) fields. Our numerical results also reveal that the Kerr nonlinear index of our considered system is greater than that of existing three-level Λ and four-level N systems. Finally, it is substantiated that self-Kerr nonlinearity is proliferated by taking the Doppler effect into account.
Coherent population trapping (CPT) resonance formation is modeled numerically in a three-level Λ -system with one of the near-resonance fields being frequency-modulated. The model is based on density matrix equations in RW approximation with atomic relaxation properly taken into account. Slow modulation is shown to be equivalent to CW excitation with the frequency changed point by point. As the modulation period approaches the relaxation times, the delayed response of the system is shown to cause the CPT resonance shift and reshaping, as well as the appearance of transient oscillations of the energy level populations.