Tunable Enhancement of High Harmonic Emission from Laser Solid Interactions

被引：31

作者：

Dromey, B. ^{[1
]}

Rykovanov, S. G. ^{[2
,4
]}

Adams, D. ^{[1
]}

Hoerlein, R. ^{[2
,5
]}

Nomura, Y. ^{[2
]}

Carroll, D. C. ^{[3
]}

Foster, P. S. ^{[6
]}

Kar, S. ^{[1
]}

Markey, K. ^{[1
]}

McKenna, P. ^{[3
]}

Neely, D. ^{[6
]}

Geissler, M. ^{[1
]}

Tsakiris, G. D. ^{[2
]}

Zepf, M. ^{[1
]}

机构：

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

[2] MPQ Garching, D-85748 Garching, Germany

[3] Univ Strathclyde, SUPA, Dept Phys, Glasgow G4 0NG, Lanark, Scotland

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

[5] Ludwig Maximilians Univ Milnchen, Sekt Phys, D-85748 Garching, Germany

[6] STFC Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

INTENSE LASER; PLASMA; GENERATION; PULSES;

D O I：

10.1103/PhysRevLett.102.225002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Coherent wake emission is a unique source of extreme ultraviolet radiation and has been recently shown to provide the basis for intense attosecond light. Here we present a novel scheme, supported by particle-in-cell simulations, demonstrating that enhancement and spectral control of the coherent wake emission signal can be achieved by modifying the interaction plasma density ramp. Significant tunable enhancement of harmonic emission is verified experimentally, with factors of > 50 in relative signal increase achieved in a narrow band of harmonics at the cutoff frequency.

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页数：4

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