Quantum interferences in resonant multiphoton-ionization processes for a strongly coupled atomic system
- Department of Applied Physics and Chemistry, and Institute for Laser Science, University of Electro-Communications, Chofu, Tokyo 182 (Japan)
The resonant multiphoton-ionization (MPI) processes in a strongly coupled atomic system have been investigated theoretically and experimentally using atomic hydrogen as a test medium. The characteristics are described with a parameter {ital NL}: the product of atom density and interaction length. The MPI characteristics exhibit a single-atom behavior revealing an Autler-Townes doublet in the low-{ital NL} region. In the high-{ital NL} region, the Autler-Townes doublet is suppressed to almost zero. This phenomenon is shown to be due to destructive interference between the excitation channels to the strongly coupled upper states. It is also shown that a narrow Doppler-free MPI peak appears at the split center of the Autler-Townes doublet in the high-{ital NL} region as a consequence of the strong coupling and the propagation effect. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 286632
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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