XV International Symposium on "Radiation from Relativistic Electrons in Periodic Structures "RREPS-25"

High-order Harmonics Generation from Spatiotemporal Plasma Photonic Crystal Driven by Relativistic Laser Pulses

15 Sept 2025, 17:30

15m

Oral Laser-driven particle accelerators and radiation sources

Speaker

Haojie Zhang (Shanghai Jiao Tong University)

Description

High-order harmonics emitted from interaction between relativistic laser and solid target can be extreme ultraviolet source. Through numerical simulations and theoretical studies, we propose a scheme to efficiently generate harmonics with abundant components of different emission angles, where two P-polarized lasers are used to drive surface plasma oscillation, and one S-polarized laser is used to generated harmonics of S-polarization. We propose that this process can be understood in perspective of spatiotemporal photonic crystals, showing the generation, selection rules and efficiency enhancement of harmonics. We also understand this process from the perspective of laser-plasma interaction, which show a high degree of consistency.