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Optics Express

Optics Express

  • Editor: C. Martijin de Sterke
  • Vol. 19, Iss. 7 — Mar. 28, 2011
  • pp: 6865–6882

Weak-field multiphoton femtosecond coherent control in the single-cycle regime

Lev Chuntonov, Avner Fleischer, and Zohar Amitay  »View Author Affiliations


Optics Express, Vol. 19, Issue 7, pp. 6865-6882 (2011)
http://dx.doi.org/10.1364/OE.19.006865


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Abstract

Weak-field coherent phase control of atomic non-resonant multiphoton excitation induced by shaped femtosecond pulses is studied theoretically in the single-cycle regime. The carrier-envelope phase (CEP) of the pulse, which in the multi-cycle regime does not play any control role, is shown here to be a new effective control parameter that its effect is highly sensitive to the spectral position of the ultrabroad spectrum. Rationally chosen position of the ultrabroadband spectrum coherently induces several groups of multiphoton transitions from the ground state to the excited state of the system: transitions involving only absorbed photons as well as Raman transitions involving both absorbed and emitted photons. The intra-group interference is controlled by the relative spectral phase of the different frequency components of the pulse, while the inter-group interference is controlled jointly by the CEP and the relative spectral phase. Specifically, non-resonant two- and three-photon excitation is studied in a simple model system within the perturbative frequency-domain framework. The developed intuition is then applied to weak-field multiphoton excitation of atomic cesium (Cs), where the simplified model is verified by non-perturbative numerical solution of the time-dependent Schrödinger equation. We expect this work to serve as a basis for a new line of femtosecond coherent control experiments.

© 2011 OSA

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.4180) Atomic and molecular physics : Multiphoton processes

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: February 18, 2011
Revised Manuscript: February 25, 2011
Manuscript Accepted: February 28, 2011
Published: March 25, 2011

Citation
Lev Chuntonov, Avner Fleischer, and Zohar Amitay, "Weak-field multiphoton femtosecond coherent control in the single-cycle regime," Opt. Express 19, 6865-6882 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-7-6865


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