Carrier envelope phase dependence of high harmonic generation from long duration multi-cycle multi-timescale pump pulses

Ofer Neufeld, Avner Fleischer, Oren Cohen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

High harmonic generation (HHG) can strongly depend on the carrier envelope phase (CEP) of its driving pulse if that pulse has a short duration of only a few optical cycles (few-cycle pulse) [1,2]. This effect is often used to characterize the CEP of laser sources [3,4], and manifests in observed harmonic cutoff frequency oscillations w.r.t. the CEP, as well as intensity oscillations in between adjacent harmonic peaks from slightly longer pulses [5]. CEP effects in HHG are known to completely vanish when the driving pulse duration is increased beyond a certain threshold [1,6,7], which is also accompanied by the formation of symmetry-allowed discrete harmonics (as opposed to continuous emission) [8,9]. Both these phenomena result from a coherent interference between harmonic photons that are generated by successive pump laser cycles, which behave time-periodically if the pump pulse is long enough. Accordingly, CEP dependence has never been observed in HHG from pulses longer than ~20fs with central wavelength of 800nm.

Original languageEnglish
Title of host publicationThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
PublisherOSA - The Optical Society
ISBN (Electronic)9781557528209
StatePublished - 2019
Externally publishedYes
EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 - Munich, Germany
Duration: 23 Jun 201927 Jun 2019

Publication series

NameOptics InfoBase Conference Papers
VolumePart F140-CLEO_Europe 2019

Conference

ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
Country/TerritoryGermany
CityMunich
Period23/06/1927/06/19

Fingerprint

Dive into the research topics of 'Carrier envelope phase dependence of high harmonic generation from long duration multi-cycle multi-timescale pump pulses'. Together they form a unique fingerprint.

Cite this