Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physics Letters A

Radiation amplification without population inversion at transitions to autoionizing states

Vasily G. Arkhipkin, Yu. I. Heller

Published Oct 1, 1983• 149 citations
Publisher
DOI
10.1016/0375-9601(83)90533-9

Related papers

Lasing without population inversion from autoionizing states

Lipika Adhya, Krishna Rai Dastidar

Il Nuovo Cimento D•Jun 1, 1992•5 citations

On the possibility of radiation amplification through multiphoton pumping of autoionizing states

H. Bachau, A. Lyras, P. Lambropoulos

Optics Communications•Jun 1, 1991•5 citations

Radiation amplification through autoionizing resonances without population inversion

A. Lyras, Xian Tang, P. Lambropoulos +1 more

We present a quantitative study of radiation amplification without population inversion based on models recently proposed by Harris [Phys. Rev. Lett. 62, 1033 (1989)]. We discuss both two-level and three-level arrangements in terms of the density matrix. Our calculations, which are fully time dependent, incorporate an incoherent pumping mechanism that is essential for amplification. We discuss in detail the range of and conditions on atomic parameters for which amplification is possible. Its feasibility is demonstrated through the direct calculation of the change of the intensity of a probe beam interacting with the atom.

Physical Review A•Oct 1, 1989•123 citations

Lasers without inversion: Raman transitions using autoionizing resonances

G. S. Agarwal, Seenipandian Ravi, J. Cooper

We consider laser action on a transition involving an autoionizing state \ensuremath{\Vert}a〉 and an initially unpopulated state \ensuremath{\Vert}f〉, the population of which builds up because of spontaneous emission and Raman processes. The autoionizing state is pumped by a coherent field. We discuss the transient amplification of the probe field on the lasing transition for a range of parameters. The coherent field on the pumping transition leads to minima in the absorption spectra if the atomic population were in the state \ensuremath{\Vert}f〉. Such regions of minima can be used for obtaining gain even for long times.

Physical Review A•May 1, 1990•75 citations

Radiation amplication without population inversion in discrete three-level systems

S. Basile, P. Lambropoulos

Optics Communications•Aug 1, 1990•79 citations

Amplification without Population Inversion in a Three level Atom

M. Pinard, G. Grynberg, Paul Mandel

European Quantum Electronics Conference (EQEC)•Jan 1, 1996•0 citations
We present a quantitative study of radiation amplification without population inversion based on models recently proposed by Harris [Phys. Rev. Lett. 62, 1033 (1989)]. We discuss both two-level and three-level arrangements in terms of the density matrix. Our calculations, which are fully time dependent, incorporate an incoherent pumping mechanism that is essential for amplification. We discuss in detail the range of and conditions on atomic parameters for which amplification is possible. Its feasibility is demonstrated through the direct calculation of the change of the intensity of a probe beam interacting with the atom.
We consider laser action on a transition involving an autoionizing state \ensuremath{\Vert}a〉 and an initially unpopulated state \ensuremath{\Vert}f〉, the population of which builds up because of spontaneous emission and Raman processes. The autoionizing state is pumped by a coherent field. We discuss the transient amplification of the probe field on the lasing transition for a range of parameters. The coherent field on the pumping transition leads to minima in the absorption spectra if the atomic population were in the state \ensuremath{\Vert}f〉. Such regions of minima can be used for obtaining gain even for long times.