Gaussian-Schell analysis of the transverse spatial properties of high-harmonic beams.

ABSTRACT: High harmonic generation (HHG) is an established means of producing coherent, short wavelength, ultrafast pulses from a compact set-up. Table-top high-harmonic sources are increasingly being used to image physical and biological systems using emerging techniques such as coherent diffraction imaging and ptychography. These novel imaging methods require coherent illumination, and it is therefore important to both characterize the spatial coherence of high-harmonic beams and understand the processes which limit this property. Here we investigate the near- and far-field spatial properties of high-harmonic radiation generated in a gas cell. The variation with harmonic order of the intensity profile, wavefront curvature, and complex coherence factor is measured in the far-field by the SCIMITAR t

SUBMITTER: Lloyd DT 

PROVIDER: S-EPMC4964618 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature