Yield and temporal characterization of high-order harmonics from intense midinfrared excitation of a cesium vapor

Journal Article · Mon Mar 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.033807· OSTI ID:20640896

Clatterbuck, T O; Lyngaa, C; Paul, P M; DiMauro, L F; Gaarde, M B; Schafer, K J; Agostini, P; Kulander, K C; Walmsley, I ^[1]

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1. Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Cesium vapor interacting with a tightly focused, intense midinfrared (3.4 {mu}m) source produces high harmonic radiation in the visible/UV spectral range. The measured yields of harmonic orders 9-17 are found to yield good quantitative agreement with numerical simulations that include both the single-atom and the macroscopic response. The 5th-9th harmonic orders are generated with sufficient pulse energies ({approx}100 pJ) for direct temporal measurements using an autocorrelation method and when correlated with bandwidth measurements are found not to be transform limited. A blueshift connected to a strong time-dependent ionization appears to be the cause of this spectral broadening.

• OSTI ID: 20640896
• Journal Information: Physical Review. A, Vol. 69, Issue 3; Other Information: DOI: 10.1103/PhysRevA.69.033807; (c) 2004 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
ATOMS
CESIUM
COMPUTERIZED SIMULATION
EXCITATION
EXCITED STATES
HARMONIC GENERATION
HARMONICS
IONIZATION
LINE BROADENING
PHOTON-ATOM COLLISIONS
PULSES
SPECTRAL SHIFT
TIME DEPENDENCE
VAPORS
YIELDS