TY - JOUR
T1 - Phase-resolved attosecond near-threshold photoionization of molecular nitrogen
AU - Haessler, S.
AU - Fabre, B.
AU - Higuet, J.
AU - Caillat, J.
AU - Ruchon, T.
AU - Breger, P.
AU - Carré, B.
AU - Constant, E.
AU - Maquet, A.
AU - Mével, E.
AU - Salières, P.
AU - Taïeb, R.
AU - Mairesse, Y.
PY - 2009/8/6
Y1 - 2009/8/6
N2 - We photoionize nitrogen molecules with a train of extreme ultraviolet attosecond pulses together with a weak infrared field. We measure the phase of the two-color two-photon ionization transition (molecular phase) for different states of the ion. We observe a 0.9π shift for the electrons produced in the ionization channels leading to the X Σ2 g+, v′ =1, and v′ =2 states. We relate this phase shift to the presence of a complex resonance in the continuum. By providing both a high spectral and temporal resolution, this general approach gives access to the evolution of extremely short-lived states, which is often not accessible otherwise.
AB - We photoionize nitrogen molecules with a train of extreme ultraviolet attosecond pulses together with a weak infrared field. We measure the phase of the two-color two-photon ionization transition (molecular phase) for different states of the ion. We observe a 0.9π shift for the electrons produced in the ionization channels leading to the X Σ2 g+, v′ =1, and v′ =2 states. We relate this phase shift to the presence of a complex resonance in the continuum. By providing both a high spectral and temporal resolution, this general approach gives access to the evolution of extremely short-lived states, which is often not accessible otherwise.
U2 - 10.1103/PhysRevA.80.011404
DO - 10.1103/PhysRevA.80.011404
M3 - Article
AN - SCOPUS:68849104161
SN - 1050-2947
VL - 80
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 1
M1 - 011404
ER -