Iranian Journal of Physics Research

A four-level atom enclosed in an optical cavity with multiphoton transition in the‏‏‎ ‎steady-state regime

Document Type : Original Article

Author

B Parvin

Department of Physics, Faculty of Basic Sciences, University of Maragheh, ‎Maragheh, Iran

https://doi.org/10.47176/ijpr.21.1.81111
Abstract
The mechanism of a four-level atom confined in a single-mode optical cavity with multiphoton transition is theoretically investigated in the steady-state. The behavior of the atom-cavity system is delineated by the master equation which in order to solve this equation, a set of expected values of a series of operators has been used. To numerically solve this set of coupled expectation values, the matrix continued fractions method is used. How the changes of the physical quantities including the atomic population inversion, mean photon number and second-order correlation function have been studied for any transition. Finally, the process of converting the four-level atom to a three-level one under several specific conditions is discussed for each transition.

Keywords

four-level atom
optical cavity
master equation
matrix continued fractions
lasing ‎‎
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