TY - GEN
T1 - Carrier envelope phase dependence of high harmonic generation from long duration multi-cycle multi-timescale pump pulses
AU - Neufeld, Ofer
AU - Fleischer, Avner
AU - Cohen, Oren
N1 - Publisher Copyright: © 2019 IEEE.
PY - 2019/6
Y1 - 2019/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85074628974&partnerID=8YFLogxK
U2 - 10.1109/CLEOE-EQEC.2019.8872386
DO - 10.1109/CLEOE-EQEC.2019.8872386
M3 - منشور من مؤتمر
T3 - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
BT - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
T2 - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
Y2 - 23 June 2019 through 27 June 2019
ER -