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We investigate the optical bistability(OB) in a duplicated two-level system contained in a ring cavity.The atoms are driven by two orthogonally polarized fields with a relative phase.The OB behavior of such a system can be controlled by the amplitude and the relative phase of the coupling field,and it is possible to switch between bistability and multistability by adjusting the relative phase. 相似文献
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Ultrafast population transfer in a Λ-configuration level system driven by few-cycle laser pulses 下载免费PDF全文
The feasibility of population transfer from a populated level via an intermediate state to the target level driven by fewcycle pulses is theoretically discussed.The processes of on-or far-resonance stimulated Raman scattering with sequential or simultaneous ultrashort pulses are investigated respectively.We find that the ultrashort pulses with about two optical cycles can be used to realize the population operation.This suggests that the population transfer can be completed in the femtosecond time scale.At the same time,our simulation shows that the signal of the carrier-envelope-phase-dependent effect can be enlarged due to quantum interference in some conditions.Our theoretic study may promote the research on the coherent control via ultrashort pulses in the related fields. 相似文献
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