Field modulation of Rydberg-state populations of NO studied by femtosecond time-resolved photoelectron imaging

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.043421· OSTI ID:21408657

Bingxing, Wang; Benkang, Liu ^[1]; Yanqiu, Wang; Li, Wang ^[1]

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1. State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023 (China)

Femtosecond time-resolved velocity map imaging combined with multiphoton ionization was applied to study the optical field modulation of NO Rydberg-state populations. The A {sup 2{Sigma}+}({upsilon}=2) state is populated by absorption of one 271-nm photon. Two peaks in the photoelectron kinetic energy spectra, centered at 0.82 and 2.35 eV, are caused by ionization from the A {sup 2{Sigma}+}({upsilon}=2) state by time-delayed one-color and two-color multiphoton ionization, respectively. In the overlap region of the pump and probe light, the C {sup 2{Pi}}({upsilon}=4) state is populated by a 1+1{sup '} excitation. When the pump laser intensity is increased, other Rydberg states (E {sup 2{Sigma}+}, F {sup 2{Delta}}, and D {sup 2{Sigma}+}) are moved into resonance by a laser-induced Stark shift. These states can be populated only within the temporal overlap region of the pump and probe light. When the intensity of the pump laser is higher than 2.9 x 10{sup 12} W/cm{sup 2}, Rydberg-valence coupling between the A {sup 2{Sigma}+}({upsilon}=2) and B {sup 2{Pi}}({upsilon}=4) states may play a key role, resulting in photoelectrons with kinetic energy of 0.37 eV. The coupling strength increases with increasing pump laser intensity.

• OSTI ID: 21408657
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
BOSONS
CHALCOGENIDES
COLOR
COUPLING
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
ENERGY RANGE
EQUIPMENT
EV RANGE
EXCITED STATES
IONIZATION
KINETIC ENERGY
LASERS
MASSLESS PARTICLES
MODULATION
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHOTOIONIZATION
PHOTONS
PHYSICAL PROPERTIES
PUMPS
RADIATIONS
RESOLUTION
RYDBERG STATES
SORPTION
TIME RESOLUTION
TIMING PROPERTIES
VISIBLE RADIATION