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; = 4; = 7
- Citation count
- 7
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMa7bdbe67227c4ffe9f750a6765957057/
- URN
urn:amu-prod:UAMa7bdbe67227c4ffe9f750a6765957057
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.