Proof-of-Concept Experiment on Quasi-Phase-Matching of High-Order Harmonic Generation Based on Selected-Zoning Method

Yao-Li Liu^1*, Shin-Chi Kao², Yi-Yong Ou Yang², Zhong-Ming Zhang², Hsu-Hsin Chu^2,3

¹Institute of Space and Plasma Sciences, National Cheng Kung University, Tainan, Taiwan
²Department of Physics, National Central University, Zhongli, Taiwan
³Center for High Energy and High Field Physics, National Central University, Zhongli, Taiwan

* Presenter:Yao-Li Liu, email:yaoliliu@gs.ncku.edu.tw

Using the transverse selective-zoning method, we present a proof-of-concept experiment for all-optical quasi-phase-matching (QPM) of high-order harmonic generation (HHG). We pre-determine the dephasing length and identify the out-of-phase regions within the interaction medium by employing a tomographic analysis of the generation process. Subsequently, a transverse disruptive pulse is applied to suppress harmonic emission in the out-of-phase regions, enabling QPM. This approach results in a 35% enhancement of the final output with only a single QPM zone.

Keywords: High-Order Harmonic Generation, Quasi-phase-matching, Selected-Zoning Method