Dressing dressed states

Ficek, Z, Freedhoff, HS and Rudolph, TG (1999) Dressing dressed states. Optics and spectroscopy, 87 5: 670-675.

Author Ficek, Z
Freedhoff, HS
Rudolph, TG
Title Dressing dressed states
Journal name Optics and spectroscopy   Check publisher's open access policy
ISSN 0030-400X
Publication date 1999-01-01
Sub-type Article (original research)
Volume 87
Issue 5
Start page 670
End page 675
Total pages 6
Place of publication Washington, US
Publisher Optical Society America
Language eng
Subject C1
240402 Quantum Optics and Lasers
780102 Physical sciences
Abstract We analyze the fluorescence spectrum of a two-level atom driven by two laser fields of different frequencies and amplitudes: a strong field on resonance with the atomic transition and a weaker field detuned by the Rabi frequency of the strong laser and its subharmonics. We show that the spectra differ significantly from the Mellow triplet of the monochromatic driving field and are composed of triplets located at harmonics as well as subharmonics of the Rabi frequency of the strong field. We find that the multipeak structure of the spectrum results from the splitting by the weaker field of the energy levels created by the strong field. The splitting appears whenever the weaker field couples to the levels in an n-photon process. In addition to the splitting of the energy levels, we find that the weaker field also shifts the resonances, an effect we attribute to a dynamical Stark shift. When the weaker field is tuned to a shifted resonance, no fluorescence occurs at the atomic frequency. The results are obtained using the numerical continued fraction method and explained in terms of the doubly dressed model.
Keyword Optics
Spectroscopy
Driven 2-level Atoms
Strong Bichromatic Field
Modulated Laser Field
Resonance-fluorescence
Subharmonic Resonances
Multiphoton Processes
Optical Frequencies
Absorption-spectra
2-photon Gain
Amplitude
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Wed, 11 Jun 2008, 01:33:06 EST