## Analytical solutions for light absorption spectra of two driven atoms

### Authors:

- Z. Ficek,
- Ryszard Tanaś,
- S. Kielich

### Abstract

The absorption spectra of a pair of two-level atoms driven on resonance by a coherent laser field are considered analytically including the dipole-dipole interaction between the atoms. Analytical formulae for the absorption spectra are derived for four regions of the dipole-dipole interaction Omega _{12}: Omega >> gamma >> mod Omega _{12} mod , Omega >> mod Omega _{12} mod >> gamma Omega approximately= mod Omega _{12} mod >> gamma , mod Omega _{12} mod >> gamma >> Omega (2 gamma being Einstein's coefficient A, and Omega the Rabi frequency). The formulae, containing both absorption-like and dispersion-like terms, reveal explicitly the resonant structure of the absorption spectra. At great intensities of the driving field the absorption is negative in a certain range of frequencies. The dipole-dipole interaction between the atoms is shown to modify considerably the form of this absorption spectrum. For sufficiently strong dipole-dipole interaction it exhibits dispersion-like behaviour in the vicinity of 2 Omega with a new region of negative absorption. The spectrum is asymmetric, albeit slightly. For strong dipole-dipole interaction and a weak driving field the spectrum consists of one absorption-like peak, located at omega - omega _{0}= Omega _{12}.

- Record ID
- UAMa7bdbe67227c4ffe9f750a6765957057
- Author
- Journal series
- Journal of the Physics B: Atomic and Molecular Physics, ISSN 0022-3700
- Issue year
- 1984
- Vol
- 17
- Pages
- 1491-1501
- ASJC Classification
- DOI
- DOI:10.1088/0022-3700/17/8/011 opening in a new tab
- Language
- en English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 5

- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMa7bdbe67227c4ffe9f750a6765957057/

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