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Related Experiment Video

Updated: May 13, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Efficient high-order harmonic generation boosted by below-threshold harmonics.

F Brizuela¹, C M Heyl, P Rudawski

¹Department of Physics, Lund University, P O Box 118, SE-22100 Lund, Sweden.

Scientific Reports

|March 12, 2013

Summary

This summary is machine-generated.

This study introduces a novel dual-cell scheme to significantly boost high-order harmonic generation (HHG) efficiency. By using below-threshold harmonics, this method enhances the generation of intense ultrashort extreme ultraviolet (XUV) pulses.

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Harmonic Nanoparticles for Regenerative Research

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Harmonic Nanoparticles for Regenerative Research

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Published on: May 1, 2014

Area of Science:

Quantum Optics
Attosecond Science
Nonlinear Optics

Background:

High-order harmonic generation (HHG) is crucial for producing coherent extreme ultraviolet (XUV) pulses.
A major limitation of HHG is its low conversion efficiency, hindering applications like ultrafast imaging and seeded free electron lasers.

Purpose of the Study:

To develop a novel scheme for enhancing the conversion efficiency of HHG.
To enable the generation of robust and intense attosecond XUV sources.

Main Methods:

A dual-cell configuration was employed, with a "seeding cell" generating below-threshold harmonics.
These harmonics were used to modify the fundamental driving field in a downstream "generation cell".
The alteration of the ionization step in the nonlinear HHG process was investigated.

Main Results:

The novel dual-cell scheme successfully boosted the HHG process.
Enhanced conversion efficiency for HHG was achieved.
The modification of the fundamental driving field by seeding harmonics proved effective.

Conclusions:

The developed dual-cell scheme significantly enhances HHG conversion efficiency.
This advancement paves the way for creating robust, intense attosecond XUV sources.
The technique offers a promising solution to overcome the efficiency limitations of current HHG methods.