Optics-less beam control of EUV high harmonics generated from solids

TL;DR

This paper introduces a novel solid-based high harmonic generation scheme that uses non-collinear illumination and wavefront phase manipulation to control EUV beams and convert them into Bessel beams without additional optics, advancing ultrafast spectroscopy and EUV applications.

Contribution

It presents a new solid-state HHG method with non-collinear illumination and wavefront control, enabling direct EUV beam shaping and Bessel beam generation without extra optics.

Findings

Demonstrated propagation control of EUV harmonics via wavefront phase manipulation.

Converted EUV harmonics into Bessel beams without additional focusing optics.

Enabled potential applications in EUV metrology and nanofabrication.

Abstract

High harmonics generation (HHG) of coherent extreme ultraviolet (EUV) radiation enables ultrafast pump-probe spectroscopy with attosecond-scale timing resolutions. Yet beam control of generated EUV radiation remains a major challenge for handy implementation of ultrafast spectroscopy particularly for nano-micro samples. Here, we demonstrate a solid-based HHG scheme that incorporates non-collinear illumination to perform the propagation control of EUV harmonics by wavefront phase manipulation via a spatial light modulator. Further, our solid-based non-collinear HHG scheme converts EUV harmonics to Bessel beams without extra optics for beam focusing, offering a useful tool for diverse EUV applications of metrology and fabrication.