Coulomb explosion and early plasma generation during femtosecond laser ablation of silicon at high laser fluence

2013 ◽  
Vol 46 (33) ◽  
pp. 335501 ◽  
Author(s):  
Xin Zhao ◽  
Yung C Shin
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Femtosecond Laser Ablation ◽  
Coulomb Explosion ◽  
Plasma Generation ◽  
High Laser Fluence ◽  
High Laser

Possible evidence of Coulomb explosion in the femtosecond laser ablation of metal at low laser fluence

2015 ◽  
Vol 355 ◽  
pp. 681-685 ◽  
Author(s):  
Shuchang Li ◽  
Suyu Li ◽  
Fangjian Zhang ◽  
Dan Tian ◽  
He Li ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Femtosecond Laser Ablation ◽  
Coulomb Explosion

Coulomb explosion in femtosecond laser ablation of Si(111)

2003 ◽  
Vol 82 (23) ◽  
pp. 4190-4192 ◽  
Author(s):  
W. G. Roeterdink ◽  
L. B. F. Juurlink ◽  
O. P. H. Vaughan ◽  
J. Dura Diez ◽  
M. Bonn ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Coulomb Explosion

A Coulomb explosion theoretical model of femtosecond laser ablation materials

2011 ◽  
Vol 55 (3) ◽  
pp. 694-701 ◽  
Author(s):  
XiaoHui Lin ◽  
HaiQuan Chen ◽  
ShuYun Jiang ◽  
ChiBin Zhang
Keyword(s):  
Theoretical Model ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Coulomb Explosion

Femtosecond Laser Ablation of Titanium and Silicon

2000 ◽  
Author(s):  
Mengqi Ye ◽  
Costas P. Grigoropoulos
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Laser System ◽  
Femtosecond Laser Ablation ◽  
Laser Pulses ◽  
Femtosecond Laser Irradiation ◽  
Nanosecond Laser ◽  
Iccd Camera ◽  
Plume Emission

Abstract Femtosecond laser ablation of titanium and silicon samples has been studied via time-of-flight (TOF), emission spectroscopy and microscopy measurement. Laser pulses of around 100 fs (FWHM) at λ = 800 nm were delivered by a Ti:sapphire femtosecond laser system. A vacuum chamber with a base pressure of 10−7 torr was built for ion TOF measurement. These ion TOF spectra were utilized to determine the velocity distribution of the ejected ions. While nanosecond laser ablation typically generates ions of a few tens of eV, femtosecond laser irradiation even at moderate energy densities can produce energetic ions with energies of up to a few keV. The most probable energy of these fast ions is proportional to the laser fluence. The structure and number of peaks of the TOF spectra varies with the laser fluence. Images of plume emission were captured by an intensified CCD (ICCD) camera. The plume emission spectrum was analyzed by a spectrometer. Laser ablated craters were measured by an interferometric microscope and a scanning electron microscope (SEM). Ablation yield was expressed as a function of laser fluence, and number of shots.

Comment on “Coulomb explosion in femtosecond laser ablation of Si(111)” [Appl. Phys. Lett. 82, 4190 (2003)]

2004 ◽  
Vol 85 (4) ◽  
pp. 694-695 ◽  
Author(s):  
R. Stoian ◽  
A. Rosenfeld ◽  
I. V. Hertel ◽  
N. M. Bulgakova ◽  
E. E. B. Campbell
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Coulomb Explosion

Compositionally Gradient Thin Film Deposition by Pulse Laser Ablation under High Gravity

2012 ◽  
Vol 323-325 ◽  
pp. 559-563
Author(s):  
Takashi Nishiyama ◽  
Takashi Kajiwara ◽  
Kunihito Nagayama
Keyword(s):  
Thin Film ◽  
Laser Ablation ◽  
Laser Fluence ◽  
Target Material ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Atomic Fraction ◽  
High Laser Fluence ◽  
High Laser ◽  
Narrow Space

A compositionally graded thin film of Fe/Si was fabricated by a gravity-assisted pulsed laser ablation (GAPLA) system. By this method, a compositionally graded structure along gravity direction was successfully produced under a gravity field of 5,400 G. Systematic experiments were conducted by several parameters, including gravity, distance between target and substrate, and laser fluence in case of typical target material of iron disilicide (FeSi2). We demonstrate that the atomic fraction of Fe, the heavier component of the thin film, showed increasing spatial distribution with the direction of gravity. Relatively high laser fluence as well as a very narrow space between the target and the substrate are found to be essential to the compositionally gradient of thin film.

scholarly journals Improved two-temperature model and its application in femtosecond laser ablation of metal target

2010 ◽  
Vol 28 (1) ◽  
pp. 157-164 ◽  
Author(s):  
Ranran Fang ◽  
Duanming Zhang ◽  
Hua Wei ◽  
Zhihua Li ◽  
Fengxia Yang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Femtosecond Laser Ablation ◽  
Temperature Model ◽  
Metal Target ◽  
Temperature Dependent ◽  
Two Temperature

AbstractAn improved two-temperature model to describe femtosecond laser ablation of metal target was presented. The temperature-dependent heat capacity and thermal conductivity of the electron, as well as electron temperature-dependent absorption coefficient and absorptivity are all considered in this two-temperature model. The tailored two-temperature model is solved using a finite difference method for copper target. The time-dependence of lattice and electron temperature of the surface for different laser fluence are performed, respectively. The temperature distribution of the electron and lattice along with space and time for a certain laser fluence is also presented. Moreover, the variation of ablation rate per pulse with laser fluence is obtained. The satisfactory agreement between our numerical results and experimental data indicates that the temperature dependence of heat capacity, thermal conductivity, absorption coefficient and absorptivity in femtosecond laser ablation of metal target must not be neglected. The present model will be helpful for the further experimental investigation of application of the femtosecond laser.

Sign in / Sign up

Export Citation Format

Share Document