title: Carrier-envelope phase effects on the spatial coherence of high-order harmonics.
abstract: In this work, we report the Carrier-Envelope Phase Effects on the Spatial Coherence of High-order Harmonics driven by phase-stabilized few-cycle mid-infrared laser pulses. The degree of coherence varies with carrier-envelope phase periodically with a period of π. At the same time, as the harmonic orders increase, the extreme points on the curve of coherence degree vs. carrier-envelope phase shift toward the direction of carrier-envelope phase increasing. Through theoretical analysis, we find that the ionization induced frequency chirp plays an important role in the Carrier-Envelope Phase Effects on the Spatial Coherence. This effect suggests a possible method to optimize the spatial coherence of harmonics by tuning the carrier-envelope phase of the driving field.
authors.forename: Hanhu
authors.initials: H
authors.lastname: Diao
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Zheng
authors.forename: Zhinan
authors.initials: Z
authors.lastname: Zeng
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Ge
authors.forename: Chuang
authors.initials: C
authors.lastname: Li
authors.forename: Ruxin
authors.initials: R
authors.lastname: Li
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu