Spatial contributions of electron trajectories to high-order-harmonic radiation originating from a semi-infinite gas cell

被引：9

作者：

Kretschmar, Martin ^{[1
,2
]}

Hernandez-Garcia, Carlos ^{[3
]}

Steingrube, Daniel S. ^{[1
,2
]}

Plaja, Luis ^{[3
]}

Morgner, Uwe ^{[1
,2
]}

Kovacev, Milutin ^{[1
,2
]}

机构：

[1] Leibniz Univ Hannover, Inst Quantenopt, D-30167 Hannover, Germany

[2] Ctr Quantum Engn & Space Time Res, QUEST, D-30167 Hannover, Germany

[3] Univ Salamanca, Grp Invest Opt Extrema, E-37008 Salamanca, Spain

来源：

PHYSICAL REVIEW A | 2013年 / 88卷 / 01期

关键词：

TEMPORAL COHERENCE; GENERATION; PHASE; INTERFERENCES; POLARIZATION;

D O I：

10.1103/PhysRevA.88.013805

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the analysis of the spatial beam profile of high-order harmonic radiation originating from a semi-infinite gas cell (SIGC). We experimentally assign contributions of electron trajectories to different spatial regions of the harmonic radiation beam. The angular divergence of the harmonic radiation is studied for the first time in a SIGC as a function of different phase-matching parameters. We relate the ratio of the dipole phase coefficients to the coherence time and divergence angle measurements. Simulations, including high-order-harmonic propagation, give further insight into the generation process and the influence of phase matching. The analysis reveals that the SIGC enables tuning of the cutoff frequency by altering the absorption of the generating medium.

引用

页数：10

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