Dipole spectrum structure of nonresonant nonpertubative driven two-level atoms
Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física)
Roso, Luis (Centro de Láseres Pulsados (Salamanca, Castella i Lleó))
Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Varela, Óscar (Universidad de Salamanca. Departamento de Física Aplicada)
Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física)
Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física)
Plaja, L. (Universidad de Salamanca. Departamento de Física Aplicada)
American Physical Society

Date:	2010
Abstract:	We analyze the dipole spectrum of a two-level atom excited by a nonresonant intense monochromatic field under the electric dipole approximation and beyond the rotating wave approximation. We show that the apparently complex spectral structure can be completely described by two families: harmonic frequencies of the driving field and field-induced nonlinear fluorescence. Our formulation of the problem provides quantitative laws for the most relevant spectral features: harmonic ratios and phases, nonperturbative Stark shift, and frequency limits of the harmonic plateau. In particular, we demonstrate the locking of the harmonic phases at the wings of the plateau opening the possibility of ultrashort pulse generation through harmonic filtering.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Physical review. A, Vol. 81, Issue 3 (March 2010) , p. 033420-1-033420-7, ISSN 1050-2947

DOI: 10.1103/PhysRevA.81.033420

7 p, 824.8 KB

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