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- Title
Selective Excitation and Creation of Population Inversion in Quantum Systems Using Unipolar Attosecond and Terahertz Pulses.
- Authors
Arkhipov, R. M.; Arkhipov, M. V.; Pakhomov, A. V.; Zhukova, M. O.; Tsypkin, A. N.; Rosanov, N. N.
- Abstract
The possibility of selective population of the energy levels of quantum systems using a single unipolar subcycle pulse and a pair of pulses has been studied. The possibility of selective population of quantum levels has been clearly illustrated based on the numerical solution of a system of equations for the density matrix of a three-level medium that interacts with a pair of subcycle attosecond and terahertz pulses. The possibility of creating a population inversion in a three-level medium using a pair of such pulses has been shown. The dynamics of population gratings in a three-level medium exposed to the action of a pair of Gaussian pulses of large amplitude on the system is studied. Whereas the shape of the gratings in a weak field is harmonic, according to analytical calculations performed by the perturbation theory, in the case of a strong field, the spatial profile of the gratings may differ from the sinusoidal profile and may have a complex structure of peaks.
- Subjects
ATTOSECOND pulses; NUMERICAL solutions to equations; DENSITY matrices; PERTURBATION theory; POPULATION dynamics; SUBMILLIMETER waves
- Publication
Optics & Spectroscopy, 2021, Vol 129, Issue 1, p120
- ISSN
0030-400X
- Publication type
Article
- DOI
10.1134/S0030400X20120863