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.

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.

Ab initio molecular dynamics and wavepacket dynamics of highly charged fullerene cations produced with intense near-infrared laser pulses

2007 ◽  
Vol 338 (2-3) ◽  
pp. 127-134 ◽  
Author(s):  
Katsunori Nakai ◽  
Hirohiko Kono ◽  
Yukio Sato ◽  
Naoyuki Niitsu ◽  
Riadh Sahnoun ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Near Infrared ◽  
Laser Pulses ◽  
Infrared Laser ◽  
Ab Initio Molecular Dynamics ◽  
Wavepacket Dynamics

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.

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