Isolated ultra-bright attosecond pulses via non-collinear gating. (1st November 2022)

• Record Type: Journal Article
• Authors: Kennedy, J P; Dromey, B; Yeung, M
• Is Part Of: New journal of physics. Volume 24:Number 11(2022)
• Publication Date: 2022-11-01
• Subjects: high harmonic generation -- plasma physics -- attosecond physics; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ac9b80
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: When light with relativistic intensity is incident on a solid target, bright attosecond pulses of extreme ultraviolet and x-ray radiation can be generated in the reflected beam. Unfortunately, the use of multi-cycle laser pulses results in trains of these attosecond pulses. Here we investigate a non-collinear gating scheme applied to surface high-harmonic generation to allow for the extraction of a single intense attosecond pulse from this train. Using 3D and 2D particle in cell (PIC) simulations we demonstrate that it is possible to angularly isolate a single attosecond pulse from the main driving laser pulse using this interaction geometry with intensities I > 10 20 W cm −2 . This result opens the door to generating bright attosecond pulses from relativistic plasmas without the need to spectrally filter the driving laser pulse.