Near-monochromatic high-harmonic radiation from relativistic laser-plasma interactions with blazed grating surfaces

M. Yeung, B. Dromey, C. Roedel, J. Bierbach, M. Wunsche, G. Paulus, T. Hahn, D. Hemmers, C. Stelzmann, G. Pretzler, M. Zepf*

*Corresponding author for this work

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Abstract

Intense, femtosecond laser interactions with blazed grating targets are studied through experiment and particle-in-cell (PIC) simulations. The high harmonic spectrum produced by the laser is angularly dispersed by the grating leading to near-monochromatic spectra emitted at different angles, each dominated by a single harmonic and its integer-multiples. The spectrum emitted in the direction of the third-harmonic diffraction order is measured to contain distinct peaks at the 9th and 12th harmonics which agree well with two-dimensional PIC simulations using the same grating geometry. This confirms that surface smoothing effects do not dominate the far-field distributions for surface features with sizes on the order of the grating grooves whilst also showing this to be a viable method of producing near-monochromatic, short-pulsed extreme-ultraviolet radiation.

Original languageEnglish
Article number025042
Number of pages15
JournalNew Journal of Physics
Volume15
DOIs
Publication statusPublished - 28 Feb 2013

Keywords

  • SOLID TARGETS
  • GENERATION
  • PULSES

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