Order-dependent structure of high harmonic wavefronts

E. Frumker*, G. G. Paulus, H. Niikura, A. Naumov, D. M. Villeneuve, P. B. Corkum

*この研究の対応する著者

研究成果: Article査読

30 被引用数 (Scopus)

抄録

The physics of high harmonics has led to the generation of attosecond pulses and to trains of attosecond pulses. Measurements that confirm the pulse duration are all performed in the far field. All pulse duration measurements tacitly assume that both the beam's wavefront and intensity profile are independent of frequency. However, if one or both are frequency dependent, then the retrieved pulse duration depends on the location where the measurement is made. We measure that each harmonic is very close to a Gaussian, but we also find that both the intensity profile and the beam wavefront depend significantly on the harmonic order. Thus, our findings mean that the pulse duration will depend on where the pulse is observed. Measurement of spectrally resolved wavefronts along with temporal characterization at one single point in the beam would enable complete space-time reconstruction of attosecond pulses. Future attosecond science experiments need not be restricted to spatially averaged observables. Our approach paves the way to recovery of the single molecule response to the strong field.

本文言語English
ページ(範囲)13870-13877
ページ数8
ジャーナルOptics Express
20
13
DOI
出版ステータスPublished - 2012 6月 18
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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