Probe of high-order harmonic generation in a hollow waveguide geometry using counterpropagating light

TY - JOUR

T1 - Probe of high-order harmonic generation in a hollow waveguide geometry using counterpropagating light

AU - Lytle, A. L.

AU - Zhang, X.

AU - Peatross, J.

AU - Murnane, M. M.

AU - Kapteyn, H. C.

AU - Cohen, O.

PY - 2007/3/23

Y1 - 2007/3/23

N2 - We use counterpropagating light to directly observe the coherent buildup of high harmonic generation in a hollow waveguide geometry. We measure, for the first time, coherence lengths for high photon energies that cannot be phase matched using conventional approaches. We also probe the transition through phase matching, the ionization level at which different harmonic orders are generated, and the change in the coherence length as the driving laser is depleted. These results directly prescribe the optimal structures or pulse trains required for implementing quasiphase matching.

AB - We use counterpropagating light to directly observe the coherent buildup of high harmonic generation in a hollow waveguide geometry. We measure, for the first time, coherence lengths for high photon energies that cannot be phase matched using conventional approaches. We also probe the transition through phase matching, the ionization level at which different harmonic orders are generated, and the change in the coherence length as the driving laser is depleted. These results directly prescribe the optimal structures or pulse trains required for implementing quasiphase matching.

UR - http://www.scopus.com/inward/record.url?scp=33947586227&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.98.123904

DO - 10.1103/PhysRevLett.98.123904

M3 - 文章

AN - SCOPUS:33947586227

SN - 0031-9007

VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

M1 - 123904

ER -