Extracting the phase of high-order harmonic emission from a molecule using transient alignment in mixed samples

Journal Article · Sat Dec 15 00:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.061403· OSTI ID:21140600

Wagner, Nicholas; Xibin, Zhou; Lock, Robynne; Wen, Li; Murnane, Margaret; Kapteyn, Henry ^[1]; Wueest, Andrea ^[2]

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1. Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440 (United States)
2. SEMATECH, 255 Fuller Road, Albany, New York 12203 (United States)

We report measurements of both the phase and intensity of high-order harmonic emission from aligned CO{sub 2} molecules, using a mixture of a molecular and an atomic gas. The molecules are transiently aligned using an ultrashort pulse, and a subsequent stronger pulse is used to generate high-order harmonics from a mixed Kr/CO{sub 2} sample. The high-order harmonic emission from the molecules interferes with the reference emission from the atoms. By monitoring the change in harmonic emission as a function of gas mixture and molecular alignment, we can retrieve the orientational dipole that has general features consistent with a two-center emission model.

• OSTI ID: 21140600
• Journal Information: Physical Review. A, Vol. 76, Issue 6; Other Information: DOI: 10.1103/PhysRevA.76.061403; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALIGNMENT
ATOM-MOLECULE COLLISIONS
ATOMS
CARBON DIOXIDE
DIPOLES
HARMONIC GENERATION
HARMONICS
KRYPTON
LUMINESCENCE
MIXTURES
MOLECULES
PHOTON-MOLECULE COLLISIONS
PULSES
SIMULATION
TRANSIENTS
VELOCITY