Abstract
Coherent wake emission is a unique source of extreme ultraviolet radiation and has been recently shown to provide the basis for intense attosecond light. Here we present a novel scheme, supported by particle-in-cell simulations, demonstrating that enhancement and spectral control of the coherent wake emission signal can be achieved by modifying the interaction plasma density ramp. Significant tunable enhancement of harmonic emission is verified experimentally, with factors of in relative signal increase achieved in a narrow band of harmonics at the cutoff frequency.
- Received 15 January 2009
DOI:https://doi.org/10.1103/PhysRevLett.102.225002
©2009 American Physical Society