Coherent control of H[sup [minus]] photodetachment in parallel static electric and magnetic fields

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.1260· OSTI ID:6601799

Wang, Q; Starace, A F ^[1]

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1. Department of Physics and Astronomy, The University of Nebraska, Lincoln, Nebraska 68588-0111 (United States)

Theoretical calculations of quantum interference effects occurring in photodetachement of H[sup [minus]] with short-pulse lasers in the presence of a uniform static electric field [Q. Wang and A. F. Starace, Phys. Rev. A 48, R1741 (1993)] are examined in more detail and extended to the case of parallel static electric and magnetic fields. We show that modulation factors characterizing near-threshold cross sections resulting from detachment by relatively long laser pulses may be employed to set the parameters that are most effective for control of detachment cross-section magnitudes with short coherent laser pulses. Use of a static magnetic field to control detached electron wave-packet motion perpendicular to the static field axis is shown to increase greatly the magnitude of quantum interference effects on the cross sections (from 10% of the field-free cross section in an optimized static electric-field case to 50% in a parallel static electric and magnetic-field case). Theoretical dependence of calculated cross sections on laser pulse lengths, time delays, relative phases, frequencies, and classical electron orbit times are presented and discussed in detail.

• OSTI ID: 6601799
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 51:2; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
AUGMENTATION
CHARGED PARTICLES
CROSS SECTIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
INTERFERENCE
IONIZATION
IONS
LASER RADIATION
MAGNETIC FIELDS
MECHANICS
PHOTOIONIZATION
PULSES
QUANTUM MECHANICS
RADIATIONS