ABOVE THRESHOLD IONIZATION OF POLAR NaK MOLECULES DRIVEN BY FEW-CYCLE LASER PULSE

2010 ◽  
Vol 09 (04) ◽  
pp. 785-795 ◽  
Author(s):  
JIE YU ◽  
CHUAN-CUN SHU ◽  
WEN-HUI HU ◽  
SHU-LIN CONG
Keyword(s):  
Laser Pulse ◽  
Degrees Of Freedom ◽  
Rotational Temperature ◽  
Threshold Ionization ◽  
Rotational States ◽  
Above Threshold Ionization ◽  
Rotational Degrees Of Freedom ◽  
Left And Right ◽  
The Right ◽  
Continuum Wave

We investigate theoretically the above-threshold ionization (ATI) of the polar NaK molecule exposed in few-cycle laser field by numerically solving the time-dependent Schrödinger equation including the vibrational and rotational degrees of freedom. The left and right ATI spectra are calculated by integrating the ionization continuum wave function over the left and the right half spheres along the laser polarization. We find that the left and right ATI spectra are asymmetric, and this asymmetry depends strongly on the molecular orientation and the carrier-envelope phase (CEP) of the laser pulse. Moreover, we also perform the calculation for different initially rotational states to study the effect of rotational temperature on the ATI dynamics.

scholarly journals Analytic model for the description of above-threshold ionization by an intense short laser pulse

2014 ◽  
Vol 89 (6) ◽  
Author(s):  
M. V. Frolov ◽  
D. V. Knyazeva ◽  
N. L. Manakov ◽  
Ji-Wei Geng ◽  
Liang-You Peng ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Short Laser Pulse ◽  
Analytic Model ◽  
Threshold Ionization ◽  
Above Threshold Ionization

scholarly journals Computational design of nanoscale rotational mechanics in de novo protein assemblies

2021 ◽  
Author(s):  
Alexis Courbet ◽  
Jesse P Hansen ◽  
Yang Hsia ◽  
Neville Bethel ◽  
Young-Jun Park ◽  
...  
Keyword(s):  
Protein Design ◽  
Degrees Of Freedom ◽  
De Novo ◽  
Computational Design ◽  
Interface Energy ◽  
Rotational States ◽  
Rotary Machinery ◽  
Rotational Degrees Of Freedom ◽  
Protein Components ◽  
Rotational Mechanics

Natural nanomachines like the F1/F0-ATPase contain protein components that undergo rotation relative to each other. Designing such mechanically constrained nanoscale protein architectures with internal degrees of freedom is an outstanding challenge for computational protein design. Here we explore the de novo construction of protein rotary machinery from designed axle and ring components. Using cryoelectron microscopy, we find that axle-ring systems assemble as designed and populate diverse rotational states depending on symmetry match or mismatch and the designed interface energy landscape. These mechanical systems with internal rotational degrees of freedom are a step towards the systematic design of genetically encodable nanomachines.

Direct evidence of ponderomotive effects via laser pulse duration in above-threshold ionization

1987 ◽  
Vol 36 (8) ◽  
pp. 4111-4114 ◽  
Author(s):  
Pierre Agostini ◽  
Joseph Kupersztych ◽  
Louis A. Lompré ◽  
Guillaume Petite ◽  
François Yergeau
Keyword(s):  
Laser Pulse ◽  
Pulse Duration ◽  
Direct Evidence ◽  
Laser Pulse Duration ◽  
Threshold Ionization ◽  
Above Threshold Ionization

scholarly journals Validity of Factorization of the High-Energy Photoelectron Yield in Above-Threshold Ionization of an Atom by a Short Laser Pulse

2012 ◽  
Vol 108 (21) ◽  
Author(s):  
M. V. Frolov ◽  
D. V. Knyazeva ◽  
N. L. Manakov ◽  
A. M. Popov ◽  
O. V. Tikhonova ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Energy ◽  
Short Laser Pulse ◽  
Threshold Ionization ◽  
Above Threshold Ionization

Rotational Energy Distributions of Benzene Liberated from Aqueous Liquid Microjets: A Comparison between Evaporation and Infrared Desorption

2006 ◽  
Vol 59 (2) ◽  
pp. 104 ◽  
Author(s):  
Olivia J. Maselli ◽  
Jason R. Gascooke ◽  
Sarah L. Kobelt ◽  
Gregory F. Metha ◽  
Mark A. Buntine
Keyword(s):  
Laser Pulse ◽  
Rotational Temperature ◽  
Rotational Energy ◽  
Vibronic Band ◽  
Energy Distributions ◽  
Rotational States ◽  
Ir Laser ◽  
Equilibrium Evaporation ◽  
Spectral Profiles ◽  
Liquid Microjets

We have measured the rotational energy distribution of benzene molecules both evaporated and desorbed by an IR laser from a liquid microjet. Analysis of the 601 vibronic band of benzene has shown that the benzene molecules evaporating from the liquid microjet surface have a rotational temperature of 157 ± 7 K. In contrast, the rotational temperature of benzene molecules desorbed from the liquid microjet by a 1.9 μm laser pulse is 82 ± 5 K. However, in both cases careful inspection of the spectral profiles shows that the experimental rotational distributions are non-Boltzmann, displaying an underpopulation of high rotational states and a relative overpopulation of the low rotational states. The non-equilibrium evaporation and desorption spectral profiles are consistent with a model that involves transfer of internal energy into translation upon liberation from the condensed phase.

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