Multi-keV ultrahigh-order harmonics produced in gases with subrelativistically intense mid-IR laser pulses

被引：8

作者：

Emelina, A. S. ^{[1
]}

Emelin, M. Yu ^{[1
,2
]}

Ryabikin, M. Yu ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

[2] Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2015年 / 32卷 / 12期

基金：

俄罗斯基础研究基金会;

关键词：

X-RAY HARMONICS; BARRIER-SUPPRESSION; ELECTRON TRAJECTORIES; GENERATION; SOFT; IONIZATION; RADIATION; ATOMS; DRIVEN; IONS;

D O I：

10.1364/JOSAB.32.002478

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Due to favorable wavelength scaling of the electron ponderomotive energy, high-order harmonic generation in gases is known to benefit from using long-wavelength femtosecond laser sources to produce high-energy photons. In this paper, using an analytical quantum-mechanical approach, taking into account the laser-induced depletion of atomic levels and the magnetic-field effects, we analyze the relative roles of these factors in limiting the generation efficiency and in shaping the spectral profile of the harmonic radiation produced with mid-IR laser pulses in various gaseous targets. Based on these calculations, we estimate the maximum width of the high-harmonic spectrum that can be obtained using the high-power mid-IR laser sources. The feasibility of multi-keV photon generation in gases irradiated by state-of-the-art mid-IR drivers is demonstrated. (C) 2015 Optical Society of America

引用

页码：2478 / 2487

页数：10

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