Controlling the divergence of high harmonics from solid targets: a route toward coherent harmonic focusing

被引：16

作者：

Hoerlein, R. ^{[1
,2
]}

Rykovanov, S. G. ^{[1
,3
]}

Dromey, B. ^{[4
]}

Nomura, Y. ^{[1
]}

Adams, D. ^{[4
]}

Geissler, M. ^{[4
]}

Zepf, M. ^{[4
]}

Krausz, F. ^{[1
,2
]}

Tsakiris, G. D. ^{[1
]}

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[2] Univ Munich, Sekt Phys, D-85748 Garching, Germany

[3] Moscow Engn Phys Inst, Moscow 115409, Russia

[4] Queens Univ Belfast, Dept Phys & Astron, Belfast BT7 1NN, Antrim, North Ireland

来源：

EUROPEAN PHYSICAL JOURNAL D | 2009年 / 55卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

LASER-PULSE; ATTOSECOND; ULTRASHORT; GENERATION;

D O I：

10.1140/epjd/e2009-00084-x

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Harmonic generation from relativistically oscillating plasma surfaces formed during the interaction of high contrast lasers with solid-density targets has been shown to be an efficient source of extreme ultraviolet (XUV) and X-ray radiation. Recent work has demonstrated that the exceptional coherence properties of the driving laser can be mirrored in the emitted radiation, permitting diffraction limited performance and attosecond phase locking of the harmonic radiation. These unique properties may allow the coherent harmonic focusing (CHF) of high harmonics generated from solid density targets to intensities on the order of the Schwinger limit of 10(29) W cm(-2) with laser systems available in the near future [Phys. Rev. Lett. 93, 115002 (2004)] and thus pave the way for unique experiments exploring the nonlinear properties of vacuum on ultra-fast timescales. In this paper we investigate experimentally as well as numerically the prospect of focusing high harmonics under realistic experimental conditions and demonstrate, using particle in cell (PIC) simulations, that precise control of the wavefronts and thus the focusability of the generated harmonics is possible with pre-shaped targets.

引用

页码：475 / 481

页数：7

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