2000/12/31 by C. P. Search, Christopher P. Search, P. R. Berman
Computer Science · Physics and Astronomy · #Absorption (acoustics) #Absorption spectroscopy #Atom (system on chip) #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Field (mathematics) #Ground state #Laser #Optics #Photon #Physics #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Recoil #Spectroscopy #Two-photon absorption #physics.atom-ph #physics.optics
paper · pdf · doi:10.1103/physreva.63.063411
30 pages, 8 figures. RevTex. Submitted to Phys. Rev. A, Revised version
arxiv created 2001/02/02 · openalex publication_date 2001/05/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 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 \ensuremathχ1\ensuremath≪\ensuremathχ2, where \ensuremathχ1 and \ensuremathχ2 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 \ensuremathχ1\ensuremath\gtrsim\ensuremathχ2, new interference effects arise that allow one to selectively turn on and off some of these recoil-induced resonances.