Dynamics of water dimer in femtosecond laser pulses: a simulation study

2014 ◽  
Vol 28 (22) ◽  
pp. 1450179
Author(s):  
Zhiping Wang ◽  
Fengshou Zhang ◽  
Xuefeng Xu ◽  
Yanbiao Wang ◽  
Chaoyi Qian
Keyword(s):  
Local Density ◽  
General Pattern ◽  
Laser Pulses ◽  
Laser Frequency ◽  
Femtosecond Laser Pulses ◽  
Water Dimer ◽  
Intense Laser ◽  
Intense Laser Pulses ◽  
Typical Sequence ◽  
The Impact

In this paper, we study the electronic and ionic dynamics of the water dimer subject to short and intense laser pulses. The dynamics is described by means of the time-dependent local-density approximation coupled to ionic molecular dynamics (TDLDA-MD) non-adiabatically. The impact of laser frequency on the response of water dimer is discussed by exploring the ionization, the dipole signal and bond lengths of water dimer. Furthermore, it is found that the water donor is more sensitive to the laser field than the water acceptor and the probabilities for the ionic states show the general pattern of the typical sequence of the interlaced production maxima.

HARMONIC GENERATIONS OF CLUSTER Na2 IN ULTRASHORT INTENSE LASER PULSES

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2687-2692 ◽  
Author(s):  
F. S. ZHANG ◽  
F. WANG ◽  
Y. ABE
Keyword(s):  
Harmonic Generation ◽  
Local Density ◽  
Laser Pulses ◽  
Time Dependent ◽  
Intense Laser ◽  
Density Approximation ◽  
The Third ◽  
Intense Laser Pulses ◽  
Laser Frequencies ◽  
Ponderomotive Potential

In the framework of the time dependent local density approximation the harmonic generation of Na2 in ultrashort intense pulses is investigated. The coupling between harmonics and plasmons of Na 2 is discussed in detail with two laser frequencies 5.266 eV, which is double the resonance of the plasmon, and 1.124 eV, which is half the frequency of plasmons, and with two different peak intensities. One finds appearance of the third and the fifth harmonic generation at high ponderomotive potential.

scholarly journals Acceleration of electrons and electromagnetic fields of highly intense laser pulses

2010 ◽  
Vol 28 (1) ◽  
pp. 195-201 ◽  
Author(s):  
Stefanie Lourenco ◽  
Nicolas Kowarsch ◽  
Werner Scheid ◽  
P.X. Wang
Keyword(s):  
Electromagnetic Fields ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Laser Frequency ◽  
Intense Laser ◽  
Wave Number ◽  
Finite Plane ◽  
Intense Laser Pulses

AbstractThe acceleration of electrons by very intense lasers in vacuum is studied for different forms of laser pulses: finite plane and three-dimensional laser pulses. The latter case is treated by introducing an approximation of the laser frequency as a function of the Cartesian components of the wave number. Various examples which lead to high accelerations of electrons are given.

Investigation on the Interactions Among Light, Material and Temperature Field in Transient Lens Effect

2007 ◽  
Author(s):  
Kimiharu Yamazaki ◽  
Masaya Tokushige ◽  
Kazuyoshi Fushinobu ◽  
Ken Okazaki
Keyword(s):  
Temperature Field ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Intense Laser ◽  
Laser Technology ◽  
Lens Effect ◽  
Cw Laser ◽  
Intense Laser Pulses ◽  
Local Temperature Distribution ◽  
Light Material

Recently, analysis and diagnosis based on laser technology is progressing rapidly by means of the advancement of the technology related to optics. It is remarkable that the technology using high intensisty laser pulses, e.g. nanosecond to femtosecond laser pulses, has advanced. Using intense laser pulses gives high industrial advantages. However, there are few reports to investigate the relation between laser pulses and liquid. In this research, we investigate the influence of the local temperature distribution generated in applications that utilized cw-laser. Furthermore, we discussed the transient lens effect that is based on the interaction between light, material and temperature field experimentally and theoretically.

Coalescence of C60 Molecules in Fullerite by Intense Femtosecond Laser Pulses: An Ab–Initio Simulation

1999 ◽  
Vol 593 ◽  
Author(s):  
A. Gambirasio ◽  
M. Bernasconi ◽  
G. Benedek ◽  
P. L. Silvestrelli
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Intense Laser ◽  
Ab Initio Molecular Dynamics ◽  
Ab Initio Simulation ◽  
Intense Laser Pulses ◽  
Thermal Melting ◽  
New Phase

ABSTRACTWe present an ab–initio molecular dynamics study of the modifications induced on fullerite by the irradiation with ultrashort very intense laser pulses. We identified the threshold for the non–thermal cage–opening of the C60 molecules which is the analogue of the laserinduced non–thermal melting observed in semiconductors and graphite. The new phase formed by the non–thermal coalescence of the C60 molecules is fluid–like and mainly formed by small chains of 2–fold coordinated carbon atoms.

scholarly journals High laser induced damage threshold photoresists for nano-imprint and 3D multi-photon lithography

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Elmina Kabouraki ◽  
Vasileia Melissinaki ◽  
Amit Yadav ◽  
Andrius Melninkaitis ◽  
Konstantina Tourlouki ◽  
...  
Keyword(s):  
Nanoimprint Lithography ◽  
Three Dimensional ◽  
Damage Threshold ◽  
Laser Pulses ◽  
Intense Laser ◽  
Optical Elements ◽  
Photonic Circuits ◽  
Future Production ◽  
Intense Laser Pulses ◽  
Laser Induced Damage

Abstract Optics manufacturing technology is predicted to play a major role in the future production of integrated photonic circuits. One of the major drawbacks in the realization of photonic circuits is the damage of optical materials by intense laser pulses. Here, we report on the preparation of a series of organic–inorganic hybrid photoresists that exhibit enhanced laser-induced damage threshold. These photoresists showed to be candidates for the fabrication of micro-optical elements (MOEs) using three-dimensional multiphoton lithography. Moreover, they demonstrate pattern ability by nanoimprint lithography, making them suitable for future mass production of MOEs.

scholarly journals Precise description of single and double ionization of hydrogen molecule in intense laser pulses

2012 ◽  
Vol 137 (4) ◽  
pp. 044112 ◽  
Author(s):  
Mohsen Vafaee ◽  
Firoozeh Sami ◽  
Babak Shokri ◽  
Behnaz Buzari ◽  
Hassan Sabzyan
Keyword(s):  
Hydrogen Molecule ◽  
Laser Pulses ◽  
Double Ionization ◽  
Intense Laser ◽  
Precise Description ◽  
Intense Laser Pulses

scholarly journals Concept of generation of extremely compressed high-energy electron bunches in several interfering intense laser pulses with tilted amplitude fronts

2012 ◽  
Vol 31 (1) ◽  
pp. 23-28 ◽  
Author(s):  
V.V. Korobkin ◽  
M.Yu. Romanovskiy ◽  
V.A. Trofimov ◽  
O.B. Shiryaev
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Intense Laser ◽  
High Energy Electron ◽  
Speed Of Light ◽  
Electron Bunches ◽  
Newton Equation ◽  
High Energies ◽  
Neutral Gas ◽  
Intense Laser Pulses

AbstractA new concept of generating tight bunches of electrons accelerated to high energies is proposed. The electrons are born via ionization of a low-density neutral gas by laser radiation, and the concept is based on the electrons acceleration in traps arising within the pattern of interference of several relativistically intense laser pulses with amplitude fronts tilted relative to their phase fronts. The traps move with the speed of light and (1) collect electrons; (2) compress them to extremely high density in all dimensions, forming electron bunches; and (3) accelerate the resulting bunches to energies of at least several GeV per electron. The simulations of bunch formation employ the Newton equation with the corresponding Lorentz force.

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