Dipole spectrum structure of non-resonant non-pertubative driven two-level atoms

Details Dipole spectrum structure of non-resonant non-pertubative driven two-level atoms Dipole spectrum structure of non-resonant non-pertubative driven two-level atoms

2010-03-24

arxiv.org/abs/1003.4566v1

Phys. Rev. A. 81, 033420 (2010)

Physics

Optics

Scientific paper

10.1103/PhysRevA.81.033420

We analize the dipole spectrum of a two-level atom excited by a non-resonant 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, non-perturbative 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 ultra-short pulse generation through harmonic filtering.

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