Abstract
The upcoming PW laser facilities may deliver laser pulses with unprecedented intensity of . Such laser pulses interacting with ultrarelativistic electrons accelerated in plasma can trigger various nonlinear quantum electrodynamic processes. Usually, ion motion is expected to be ignorable since the laser intensities below are underrelativistic for ions. Here, we find that ion motion becomes significant even with the intensity around when electron cavitation is formed by the strong laser ponderomotive force. Due to the electron cavitation, guided laser propagation becomes impossible via usual plasma electron response to laser fields. However, we find that ion response to the laser fields may effectively guide laser propagation at such high intensity levels. The corresponding conditions of the required ion density distribution and laser power are presented and verified by three-dimensional particle-in-cell simulations.
- Received 17 July 2019
- Revised 22 October 2019
DOI:https://doi.org/10.1103/PhysRevE.101.011201
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