Controlling quantum wave packet of electronic motion on field‐dressed Coulomb potential of by carrier‐envelope phase‐dependent strong field laser pulses

2021 ◽  
Author(s):  
Mohammad Noh Daud
Keyword(s):  
Wave Packet ◽  
Coulomb Potential ◽  
Strong Field ◽  
Laser Pulses ◽  
Carrier Envelope Phase ◽  
Electronic Motion ◽  
Quantum Wave

scholarly journals Controlling Quantum Wave Packet of Electronic Motion on Field-Dressed Coulomb Potential of H2+ by Carrier-Envelope Phase-Dependent Strong Field Laser Pulses

2021 ◽  
Author(s):  
Mohammad Noh Daud
Keyword(s):  
Coulomb Potential ◽  
Strong Field ◽  
Laser Pulses ◽  
Time Duration ◽  
Carrier Envelope Phase ◽  
Free Region ◽  
Field Free Region ◽  
Electronic Motion ◽  
Quantum Wave ◽  
The Right

Solving numerically a non-Born-Oppenheimer time-dependent Schrödinger equation to study the dissociative-ionization of H subjected to strong field six-cycle laser pulses (I = 4 × 10 W/cm, λ = 800 nm) leads to newly ultrafast images of electron dynamics in H. The electron distribution in H oscillates symmetrically with laser cycle with θ + π periodicity and gets trapped between two protons for about 8 fs by a Coulomb potential well. Nonetheless, this electron symmetrical distribution breaks up for the H internuclear separation larger than 9 a.u. in the field-free region at a time duration of 24 fs as a result of the distortion of Coulomb potential where the ejected electron preferentially localizes in one of the double-well potential separated by the inner Coulomb potential barrier. Moreover, controlling laser carrier-envelope phase θ enables one to generate the highest total asymmetry A of 0.75 and -0.75 at 10 and 190, respectively, associated with the electron preferential directionality being ionized to the left or the right paths along the H molecular axis. Thus the laser-controlled electron slightly reorganizes its position accordingly to track the shift in the position of the protons despite much heavier the proton’s mass.

CONTROLLING WAVE PACKET INTERFERENCE OF DISSOCIATING MOLECULES BY SHAPING LASER PULSES IN FREQUENCY DOMAIN

2008 ◽  
Vol 07 (06) ◽  
pp. 1159-1169 ◽  
Author(s):  
YONG-CHANG HAN ◽  
KAI-JUN YUAN ◽  
SHU-LIN CONG
Keyword(s):  
Wave Packet ◽  
Frequency Domain ◽  
Laser Field ◽  
Wave Packets ◽  
Laser Pulses ◽  
Time Dependent ◽  
Pulse Excitation ◽  
Density Functions ◽  
Excitation Scheme ◽  
Quantum Wave

The interference of dissociating wave packets for the Br 2 molecule in femtosecond laser field is studied theoretically using time-dependent quantum wave packet method. The interference of dissociating wave packets can be determined by the spectrum of laser field. By shaping laser pulses in frequency domain, the corresponding R- and v-dependent density functions can be effectively controlled. Compared with the 2-pulse excitation scheme, the resolution of the interference patterns can be improved by using 3- and 4-pulse excitation schemes. The dissociating velocity can be steered by varying laser parameters.

scholarly journals Interaction of carrier envelope phase-stable laser pulses with graphene: the transition from the weak-field to the strong-field regime

2019 ◽  
Vol 21 (4) ◽  
pp. 045003 ◽  
Author(s):  
Christian Heide ◽  
Tobias Boolakee ◽  
Takuya Higuchi ◽  
Heiko B Weber ◽  
Peter Hommelhoff
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Weak Field ◽  
Carrier Envelope Phase ◽  
Stable Laser

scholarly journals Study in momentum space of phase-dependent effects on ionization of hydrogen atom interacting with short infrared laser pulses

2021 ◽  
Author(s):  
Fréderic ONGONWOU ◽  
Hugues Merlain TETCHOU ◽  
Thierry Blanchard EKOGO ◽  
Bakari ABDOURAMAN ◽  
Moïse Godefroy KWATO
Keyword(s):  
Laser Pulse ◽  
Coulomb Potential ◽  
Momentum Space ◽  
Bound States ◽  
Laser Pulses ◽  
Infrared Laser ◽  
Time Dependent ◽  
Basis Set ◽  
Angular Distributions ◽  
Carrier Envelope Phase

We examine above-threshold ionization spectra of model atomic hydrogen in short infrared laser pulses by solving the one-electron time-dependent Schr\“odinger equation in momentum space. To bypass the difficulty of solving the time-dependent Schr\”odinger equation with the interacting nonlocal Coulomb potential, we have recently formulated an alternative \emph{ab initio} approach [Ongonwou et al. Annals of Physics {\bf 375}, 471 (2016)], which is relied on the expansion of the atomic wavefunction and the interacting nonlocal Coulomb potential on a discrete basis set of Coulomb Sturmians in momentum space. As far as short infrared laser pulses are concerned, we have numerically evaluated the photoelectron momentum distributions, angular distributions and bound states populations. The results obtained from our accurate new computationally method are compared against predictions of other time-dependent calculations in the literature. This new theoretical model shows its sensitivity to the carrier-envelope phase of the laser pulse and captures the left-right dependence of the emitted photoelectrons momentum and angular distributions. More precisely, short pulses manifest significant dependence of the differential ionization probability on carrier-envelope phase of the laser pulse and broken forward-backward symmetry in the angular distributions.

scholarly journals Carrier envelope phase effects in strong field ionization of xenon with few-cycle 1.8 μm laser pulses

2013 ◽  
Vol 41 ◽  
pp. 02011
Author(s):  
B. E. Schmidt ◽  
M. Möller ◽  
A. M. Sayler ◽  
A. D. Shiner ◽  
G. Vampa ◽  
...  
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Field Ionization ◽  
Carrier Envelope Phase ◽  
Strong Field Ionization

scholarly journals Generation of intense, carrier-envelope phase-locked few-cycle laser pulses through filamentation

2004 ◽  
Vol 79 (6) ◽  
pp. 673-677 ◽  
Author(s):  
C.P. Hauri ◽  
W. Kornelis ◽  
F.W. Helbing ◽  
A. Heinrich ◽  
A. Couairon ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Carrier Envelope Phase

scholarly journals Control of strong-field ionization with two-color laser pulses

2015 ◽  
Vol 635 (9) ◽  
pp. 092122
Author(s):  
N Camus ◽  
L Fechner ◽  
D G Arbó ◽  
C Lemell ◽  
S Nagele ◽  
...  
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Field Ionization ◽  
Strong Field Ionization
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