Quasi-phase-matching and quantum-path control of high-harmonic generation using counterpropagating light

@inproceedings{Zhang2007QuasiphasematchingAQ,
  title={Quasi-phase-matching and quantum-path control of high-harmonic generation using counterpropagating light},
  author={Xiaoshi Zhang and A. L. Lytle and T Popmintchev and Xibin Zhou and Henry Cornelius Kapteyn and Margaret M. Murnane and Oren Cohen},
  year={2007}
}
High-order harmonic upconversion of femtosecond lasers produces a unique source of short-wavelength light with femtosecond-toattosecond pulse duration. However, because the involved nonlinear medium is a partially ionized gas, traditional approaches for phase-matching the conversion process are not applicable. This severely limits the flux from this source. Here, we demonstrate the first use of a train of counterpropagating light pulses to enhance high-harmonic emission. This all-optical quasi… CONTINUE READING
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