Relativistic short-pulse high harmonic generation at 1.3 and 2.1 μm wavelengths
Abstract
While nearly all investigations of high order harmonic generation with relativistically intense laser pulses have taken place at 800 or 1053 nm, very few experimental studies have been done at other wavelengths. In this study, we investigate the scaling of relativistic high harmonic generation towards longer wavelengths at intensities of a 0 ∼ 1. Longer driver wavelengths enable enhanced diagnostics of the harmonic emission, as multiple orders lie in the optical regime. We measure the conversion efficiency by collecting the entire harmonic emission as well as the divergence through direct imaging. We compare the emission with 2D particle-in-cell simulations to determine the experimental target conditions. This new regime of high order harmonic generation also enables relativistic scaling as well as improved discrimination of harmonic generation mechanisms.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2019
- Source ID
- 10.1088/1367-2630/ab1823
Entities
People
- Franklin J Dollar
- Jinpu Lin
- John Nees
- Karl Krushelnick
- N. F. Beier
- Thanh Nguyen
Organizations
- Air Force Office of Scientific Research
- National Science Foundation