arXiv physics/00120022000-12physics.atom-phphysics.optics

非线性、基态、泵浦-探测光谱中的光子诱导共振

Recoil-Induced-Resonances in Nonlinear, Ground-State, Pump-Probe Spectroscopy

C. P. Search, P. R. Berman

备注：: 30 pages, 8 figures. RevTex. Submitted to Phys. Rev. A, Revised version
DOI：: 10.1103/PhysRevA.63.063411

摘要：

本文发展了一种泵浦-探测光谱理论，即光场驱动三能级$Λ$原子系综基态之间的双光子喇曼跃迁。原子与场相互作用产生的反冲效应在这个理论中得到了充分的解释。本文计算了两个任意强度的泵浦场存在时弱探测场的线性吸收系数。对于亚反冲冷却的原子，光谱由八条吸收线和八条发射线组成。在$χ_{1}\ll χ_{2}$（其中$χ_{1}$和$χ_{2}$为两个泵浦场的Rabi频率）的极限下，恢复了单泵浦光场作用下探测场与有效二能级原子相互作用的吸收谱.然而，当$χ_{1}\gtrsim χ_{2}$时，出现新的干涉效应，其允许选择性地打开和关闭这些反冲诱导的共振中的一些。

英文摘要：

A theory of pump-probe spectroscopy is developed in which optical fields drive two-photon Raman transitions between ground states of an ensemble of three-level $Λ$ atoms. Effects related to the recoil the atoms undergo as a result of their interactions with the fields are fully accounted for in this theory. The linear absorption coefficient of a weak probe field in the presence of two pump fields of arbitrary strength is calculated. For subrecoil cooled atoms, the spectrum consists of eight absorption lines and eight emission lines. In the limit that $χ_{1}\ll χ_{2}$, where $χ_{1}$ and $χ_{2}$ are the Rabi frequencies of the two pump fields, one recovers the absorption spectrum for a probe field interacting with an effective two-level atom in the presence of a single pump field. However when $χ_{1}\gtrsim χ_{2}$, new interference effects arise that allow one to selectively turn on and off some of these recoil induced resonances.

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摘要：

英文摘要：

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