Year: 2023
Type: article
Abstract: Intense laser fields interact very differently with micrometric rough surfaces than with flat objects. The interaction features high laser energy absorption and increased emission of MeV electrons, ions, and of hard x-rays. In this work, we irradiated isolated, translationally-symmetric objects in the form of micrometric Au bars. The interaction resulted in the emission of two forward-directed electron jets having a small opening angle, a narrow energy spread in the MeV range, and a positive angle to energy correlation. Our numerical simulations show that following ionization, those electrons that are pulled into vacuum near the object's edge, remain in-phase with the laser pulse for long enough so that the Lorentz force they experience drive them around the object's edge. After these electrons pass the object, they form attosecond duration bunches and interact with the laser field over large distances in vacuum in confined volumes that trap and accelerate them within a narrow range of momentum. The selectivity in energy of the interaction, its directionality, and the preservation of the attosecond duration of the electron bunches over large distances, offer new means for designing future laser-based light sources.
Source: Scientific Reports
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,390
Funders: National Science Foundation, United States - Israel Binational Science Foundation, Grantová Agentura České Republiky, Tel Aviv University, Engineering and Physical Sciences Research Council, Center for Nanoscience and Nanotechnology, Tel Aviv University, Office of Advanced Cyberinfrastructure
Awards: NSF-BSF: Investigation of Streaming Instabilities for Tailoring the Profile of High-Energy Laser-Generated Proton Beams, G1453181110, Track 4: Advanced CI Coordination Ecosystem: Monitoring and Measurement Services, G2114340465, G3226045097, G3562386289, G3611260359, XSEDE 2.0: Integrating, Enabling and Enhancing National Cyberinfrastructure with Expanding Community Involvement, G3994843992, Track 1: ACCESS Resource Allocations Marketplace and Platform Services (RAMPS), G4010157413, ACO: An Open CI Ecosystem to Advance Scientific Discovery (OpenCI), Multi-scale simulation of intense laser plasma interactions, G4875486994, NSF-GACR: Study of Gamma-Ray Generation in High-Intensity Laser-Plasma Interactions at ELI Beamlines, Track 3: COre National Ecosystem for CyberinfrasTructure (CONECT), G5367127336, G5464919783, Theoretical and Experimental Study of the Influence of Orbital Angular Momentum of Light on High-Intensity Laser-Plasma Interactions, G7015396675, Track 2: Customized Multi-tier Assistance, Training, and Computational Help (MATCH) for End User ACCESS to CI
OpenAlex ID: W4389300568