Tuning the size of gold nanoparticles produced by multiple filamentation of femtosecond laser pulses in aqueous solutions

2018 ◽  
Vol 20 (36) ◽  
pp. 23403-23413 ◽  
Author(s):  
Hakim Belmouaddine ◽  
Minghan Shi ◽  
Léon Sanche ◽  
Daniel Houde
Keyword(s):  
Gold Nanoparticles ◽  
Light Intensity ◽  
Femtosecond Laser ◽  
Aqueous Solutions ◽  
Size Distribution ◽  
Laser Irradiation ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Gold Chloride ◽  
Multiple Filamentation

Trivial variations of the light intensity modulate the femtosecond laser multiple filamentation process in irradiated gold chloride aqueous solutions. The rate of energy deposited (in J L−1 s−1) by laser irradiation shapes the size distribution of the laser-induced gold nanoparticles.

The diffraction-ray model of single filamentation of femtosecond laser pulses for estimating characteristics of the multiple filamentation domain in air

2021 ◽  
Vol 64 (1) ◽  
pp. 154-164
Author(s):  
A.A. Zemlyanov ◽  
◽  
Y.E. Geints ◽  
O.V. Minina ◽  
◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Peak Power ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Small Scale ◽  
Beam Forming ◽  
Physical Processes ◽  
Multiple Filamentation ◽  
Number Increase

The characteristics of the domain of multiple filamentation of femtosecond laser pulses in air were estimated based on the single filamentation model. As the single filamentation model, the diffraction-ray model is considered. It is based on the representation of a laser beam as a set of diffraction-ray tubes nested in each other that do not intersect in space and do not exchange energy with each other. In this situation changes in tubes shape and cross section during propagation demonstrate the effect of physical processes that occur with radiation in the medium. It is shown that the use of this model for interpreting experimental results and predicting effects is effective. In particular, it was demonstrated that the radius of small-scale intensity inhomogeneities in the profile of a centimeter laser beam, forming the domain of multiple filamentation of subterawatt femtosecond laser pulses, is several millimeters. The power in these inhomogeneities varies from several units to several tens of gigawatts. Telescoping the initial laser beam, leading to an increase in its radius, also expands the sizes of the initial small-scale intensity inhomogeneities and reduces the power contained in them. As a result of this, the coordinate of the filamentation beginning shifts along the path from the source of laser pulses. As the peak power in the beam increases, the length of the filaments and their number increase.

Control of Multiple Filamentation of Femtosecond Laser Pulses in Air

2020 ◽  
Vol 33 (1) ◽  
pp. 42-50
Author(s):  
D. V. Apeksimov ◽  
Yu. E. Geints ◽  
A. A. Zemlyanov ◽  
A. M. Kabanov ◽  
G. G. Matvienko ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

scholarly journals Optimization of multiple filamentation of femtosecond laser pulses in air using a pinhole

2007 ◽  
Vol 15 (24) ◽  
pp. 16102 ◽  
Author(s):  
Zuo-Qiang Hao ◽  
Jie Zhang ◽  
Ting-Ting Xi ◽  
Xiao-Hui Yuan ◽  
Zhi-Yuan Zheng ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

Multiple filamentation of femtosecond laser pulses

2016 ◽  
Vol 80 (1) ◽  
pp. 64-67
Author(s):  
A. V. Kuznetsov ◽  
A. S. Kuzakov ◽  
E. F. Martynovich
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

scholarly journals Processing of Single-Walled Carbon Nanotubes with Femtosecond Laser Pulses

2019 ◽  
Vol 9 (19) ◽  
pp. 4022 ◽  
Author(s):  
Zeyad Almutairi ◽  
Kaleem Ahmad ◽  
Mosaad Alanazi ◽  
Abdulaziz Alhazaa
Keyword(s):  
Carbon Nanotubes ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Cost Effective ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Femtosecond Laser Irradiation ◽  
Single Wall Carbon Nanotubes ◽  
Glass Substrates ◽  
Focus Plane

There are continued efforts to process and join single wall carbon nanotubes (SWCNTs) in order to exploit their exceptional functional properties for real-world applications. In this work, we report experimental observations of femtosecond laser irradiation on SWCNTs, in order to process and join them through an efficient and cost-effective technique. The nanotubes were deagglomerated in ethanol by an ultrasonicator and thin slurries of SWCNTs were spread evenly on glass substrates. A laser micromachining workstation for laboratory FemtoLAB (workshop of photonics) has been employed to irradiate the different SWCNTs film samples. The effect of laser parameters, such as pulse wavelength, laser power, etc., were systematically tuned to see the possibility of joining the SWCNTs ropes. Several experiments have been performed to optimize the parameters on different samples of SWCNTs. In general, the nanotubes were mostly damaged by the infrared (1st harmonics femtosecond laser) irradiation on the focal plane. However, the less damaging effect was observed for second harmonics (green wavelength) irradiation. The results suggest some joining of nanotubes along the sides of the focus plane, as well as on the center at the brink of nanotubes. The joining is considered to be established within the region of the high field intensity of the exposed femtosecond laser beam.

Gold nanoparticles modification by femtosecond laser pulses in the air

2015 ◽  
Vol 53 (4) ◽  
pp. 605-608
Author(s):  
O. V. Chefonov ◽  
D. S. Sitnikov ◽  
I. V. Ilina ◽  
M. S. Kotelev ◽  
A. A. Novikov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses
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