Optimal Control of High-Harmonic Generation

Arnau Pou,Carles Serrat,M Chergui,S Cundiff,K Yamagouchi,R De Vivie-Riedle,A Taylor

doi:10.1051/epjconf/20134101001

Arnau Pou, Carles Serrat + Show 5 more

Open Access

https://doi.org/10.1051/epjconf/20134101001

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Abstract

A static electric field added at each spot of the interaction region controls high-order harmonic generation. The method is all-optical and susceptible to feedback- loop control schemes. We show that high-harmonics can be selectively enhanced using a quasi-phase matching (QPM) scheme based on the single-atom microscopic dipole phase modulation. We use spatial distributions of dc electric fields to shape the laser field at each spot of the interaction volume (1, 2). By tracking the coherence length variation of the different harmonics along the propagation direction, specific harmonics near the cutoff region can be enhanced.

Highlights

We show that high-harmonics can be selectively enhanced using a quasi-phase matching (QPM) scheme based on the single-atom microscopic dipole phase modulation
In [2] it was shown that a periodic weak dc electric field configuration added to the interaction volume in a high-order harmonic generation process controls the phase of the short and long quantum electron trajectories generating the harmonics, which results in a macroscopic QPM effect
We observe that the evolution of the coherence length along propagation becomes progressively oscillatory as the harmonics enter the cutoff region

Summary

Introduction

We show that high-harmonics can be selectively enhanced using a quasi-phase matching (QPM) scheme based on the single-atom microscopic dipole phase modulation. A static electric field added at each spot of the interaction region controls high-order harmonic generation. By tracking the coherence length variation of the different harmonics along the propagation direction, specific harmonics near the cutoff region can be enhanced.

Results

Conclusion