Elliptically polarized high-harmonic radiation for production of isolated attosecond pulses

被引：10

作者：

Bengs, Ulrich ^{[1
]}

Zhavoronkov, Nickolai ^{[1
]}

机构：

[1] Max Born Inst Berlin, Max Born Str 2A, D-12489 Berlin, Germany

来源：

SCIENTIFIC REPORTS | 2021年 / 11卷 / 01期

关键词：

HIGH-ORDER HARMONICS; GENERATION; LASER;

D O I：

10.1038/s41598-021-88557-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Circularly polarized attosecond pulses are powerful tool to study chiral light-matter interaction via chiral electron dynamics. However, access to isolated circularly polarized attosecond pulses enabling straightforward interpretation of measurements, still remains a challenge. In this work, we experimentally demonstrate the generation of highly elliptically polarized high-harmonics in a two-color, bi-circular, collinear laser field. The intensity and shape of the combined few-cycle driving radiation is optimized to produce a broadband continuum with enhanced spectral chirality in the range of 15-55 eV supporting the generation of isolated attosecond pulses with duration down to 150 as. We apply spectrally resolved polarimetry to determine the full Stokes vector of different spectral components of the continuum, yielding a homogenous helicity distribution with ellipticity in the range of 0.8-0.95 and a negligible unpolarized content.

引用

页数：10

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