利用准相位匹配高次谐波产生的13纳米高相干光。

Highly coherent light at 13 nm generated by use of quasi-phase-matched high-harmonic generation.

作者信息

Zhang X, Libertun A R, Paul A, Gagnon E, Backus S, Christov I P, Murnane M M, Kapteyn H C, Bartels R A, Liu Y, Attwood D T

机构信息

JILA, University of Colorado, Boulder, Colorado 80309-0440, USA.

出版信息

Opt Lett. 2004 Jun 15;29(12):1357-9. doi: 10.1364/ol.29.001357.

DOI:10.1364/ol.29.001357

PMID:15233434

Abstract

By measuring the fringe visibility in a Young's double pinhole experiment, we demonstrate that quasi-phase-matched high-harmonic generation produces beams with very high spatial coherence at wavelengths around 13 nm. To our knowledge these are the highest spatial coherence values ever measured at such short wavelengths from any source without spatial filtering. This results in a practical, small-scale, coherent, extreme-ultraviolet source that is useful for applications in metrology, imaging, and microscopy.

摘要

通过在杨氏双针孔实验中测量条纹可见度，我们证明了准相位匹配高次谐波产生在波长约13纳米处产生具有非常高空间相干性的光束。据我们所知，这些是在如此短波长下从未经空间滤波的任何光源测量到的最高空间相干值。这产生了一种实用的、小规模的、相干的极紫外光源，可用于计量、成像和显微镜应用。