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We report on tunnel ionization of Xe by 2-cycle, intense, infrared laser pulses and its dependence on carrier-envelope-phase (CEP). At low values of optical field ($E$), the ionization yield is maximum for cos-like pulses with the…

Measurements and calculations of the absolute carrier-envelope phase (CEP) effects in the photodissociation of the simplest molecule, H2+, with a 4.5-fs Ti:Sapphire laser pulse at intensities up to (4 +- 2)x10^14 Watt/cm^2 are presented.…

Chemical Physics · Physics 2013-09-23 T. Rathje , A. M. Sayler , S. Zeng , P. Wustelt , H. Figger , B. D. Esry , G. G. Paulus

We demonstrate and characterize that a carrier-envelope-phase (CEP)-controlled ultrashortchirped field is an efficient and robust mechanism to modify the dissociation dynamics of molecularhydrogen. Different dissociation pathways are…

Atomic Physics · Physics 2019-12-11 S. A. Karakaş , P. Rosenberger , M. F. Ciappina , M. F. Kling , İ. Yavuz

Carrier envelope phase (CEP) stabilized 5 fs and 22 fs pulses of intense 800 nm light are used to probe the strong-field ionization dynamics of multielectron entities, xenon and carbon disulfide. We compare ion yields obtained with and…

Atomic Physics · Physics 2015-06-12 D. Mathur , K. Dota , A. K. Dharmadhikari , J. A. Dharmadhikari

Carrier envelope phase (CEP) stabilized pulses of intense 800 nm light of 5 fs duration are used to probe the dissociation dynamics of dications of isotopically-substituted water, HOD. HOD$^{2+}$ dissociates into either H$^+$ + OD$^+$ or…

Atomic Physics · Physics 2013-07-30 D. Mathur , K. Dota , J. A. Dharmadhikari , A. K. Dharmadhikari

We investigate, from a theoretical perspective, photo-emission of electrons induced by ultra-short infrared pulses covering only a few photon cycles. In particular, we investigate the impact of the Carrier-Envelope Phase (CEP) of the laser…

Atomic and Molecular Clusters · Physics 2018-01-17 Paul-Gerhard Reinhard , Eric Suraud , Chris Meier

We present a joint experimental-theoretical study on the effect of the carrier-envelope phase (CEP) of a few-cycle pulse on the atomic excitation process. We focus on the excitation rates of argon as a function of CEP in the intensity range…

In strong laser fields, sub-femtosecond control of chemical reactions with the carrier-envelope phase (CEP) becomes feasible. We have studied the control of reaction dynamics of acetylene and allene in intense few-cycle laser pulses at 750…

We investigate numerically with Hylleraas coordinates the frequency dependence of the carrier-envelope phase (CEP) effect on bound-bound transitions of helium induced by an ultrashort laser pulse of few cycles. We find that the CEP effect…

Atomic Physics · Physics 2013-01-07 Dian Peng , Biao Wu , Panming Fu , Bingbing Wang , Jiangbin Gong , Zong-Chao Yan

Above-threshold ionization spectra from cesium are measured as a function of the carrier-envelope phase (CEP) using laser pulses centered at 3.1 $\mu$m wavelength. The directional asymmetry in the energy spectra of backscattered electrons…

The electron localization in the dissociation of the asymmetric charged molecular ion HeH$^{2+}$ exposed to an intense few-cycle laser pulse is studied by solving numerically the 3D time-dependent Schr\"odinger equation. By varying the…

Atomic Physics · Physics 2011-10-05 Kunlong Liu , Weiyi Hong , Peixiang Lu

We theoretically analyze angle-resolved photo-electron spectra (ARPES) generated by the interaction of C$_{60}$ with intense, short laser pulses. In particular, we focus on the impact of the carrier-envelope phase (CEP) onto the angular…

Atomic and Molecular Clusters · Physics 2017-04-05 C. -Z. Gao , P. M. Dinh , P. -G. Reinhard , E. Suraud , C. Meier

In few-cycle pulses, the exact value of the carrier-envelope phase difference (CEPD) has a pronounced influence on the ionization dynamics of atoms and molecules. We show that for atoms in circularly polarized light, a change in the CEPD is…

Atomic Physics · Physics 2009-11-13 Christian Per Juul Martiny , Lars Bojer Madsen

The dissociation of an H$_2^+$ molecular-ion beam by linearly polarized, carrier-envelope-phase-tagged 5 fs pulses at 4$\times10^{14} $W/cm$^2$ with a central wavelength of 730 nm was studied using a coincidence 3D momentum imaging…

We have investigated the ionization of the H atom by intense few-cycle laser pulses, in particular the intra-pulse interference effects, and their dependence on the carrier-envelope phase (CEP) of the laser pulse. In the final momentum…

Atomic Physics · Physics 2015-06-22 A. Tóth , S. Borbély , K. Tőkési , L. Nagy

We investigate the carrier-envelope phase and intensity dependence of the longitudinal momentum distribution of photoelectrons resulting from above-threshold ionization of argon by few-cycle laser pulses. The intensity of the pulses with a…

Atomic Physics · Physics 2018-07-04 M. Kübel , M. Arbeiter , C. Burger , Nora G. Kling , T. Pischke , R. Moshammer , T. Fennel , M. F. Kling , B. Bergues

We study the impact of two-color ($\omega$ and $2\omega$) co- and counter-rotating ultrashort attosecond laser pulses on non-isotropic atomic targets through the one- and two-photon interference pattern of the photoelectron spectrum.…

Atomic Physics · Physics 2026-05-08 Juan J. Omiste , Lars Bojer Madsen

We numerically study the interaction of a terahertz pulse with monolayer graphene. We observe that the electron momentum density is affected by the carrier-envelope phase (CEP) of the single- to few-cycle terahertz laser pulse that induces…

Mesoscale and Nanoscale Physics · Physics 2018-04-05 C. Lefebvre , D. Gagnon , F. Fillion-Gourdeau , S. MacLean

We investigated the carrier-envelope phase (CEP) stability of a hollow-fiber setup used for high-energy, few-cycle pulse generation. Saturation of the output pulse energy is observed at 0.6 mJ for a 260 um inner-diameter, 1 m long fiber,…

Formation of electron vortices and momentum spirals in photodetachment of the H$^-$ anion driven by isolated ultrashort laser pulses of circular polarization or by pairs of such pulses (of either corotating or counterrotating polarizations)…

Atomic Physics · Physics 2022-11-23 M. M. Majczak , F. Cajiao Vélez , J. Z. Kamiński , K. Krajewska
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