Control of interferences in an Autler-Townes doublet: Symmetry of control parameters

Journal Article · Tue Jul 01 04:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.015401· OSTI ID:20639982

Wollenhaupt, M; Assion, A; Bazhan, O; Horn, Ch; Liese, D; Sarpe-Tudoran, Ch; Winter, M; Baumert, T ^[1]

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1. Fachbereich Physik, Universitaet Kassel, Heinrich-Plett-Strasse 40, D-34132 Kassel, (Germany)

Coherent control beyond population control and spectral interferences is demonstrated on the interferences and intensity of the two Autler-Townes (AT) components in the photoelectron spectrum of K atoms, using a sequence of two intense time-delayed femtosecond laser pulses. Photoelectron spectra were taken at various delay times between the two laser pulses and at different laser intensities at a fixed delay time. With respect to the interferences in the AT doublet the role of time delay and laser intensity is interchangeable for (n+0.5){pi} excitation. Strong laser fields or the optical phase of the delayed laser pulse allow the quantum mechanical phase of an atomic state to be manipulated in a symmetrical fashion. The observations are discussed in terms of a two-level model coupled to the continuum. For suitable combinations of the laser intensity of the first pulse and the time delay, the second laser pulse leaves the excited state population unchanged.

• OSTI ID: 20639982
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CONTROL
EXCITATION
EXCITED STATES
INTERFERENCE
LASER RADIATION
PHOTOELECTRON SPECTROSCOPY
PHOTON-ATOM COLLISIONS
PULSES
QUANTUM MECHANICS
STARK EFFECT
SYMMETRY
TIME DELAY