Laser pulse number dependent nanostructure evolution by illuminating self-assembled microsphere array

2017 ◽  
Vol 122 (24) ◽  
pp. 243102 ◽  
Author(s):  
Dong Feng ◽  
Ding Weng ◽  
Bao Wang ◽  
Jiadao Wang
Keyword(s):  
Laser Pulse ◽  
Pulse Number ◽  
Self Assembled ◽  
Microsphere Array

CONTROLLING ABOVE-THRESHOLD DISSOCIATION BRANCHING RATIOS OF HD+ WITH FEMTOSECOND LASER PULSE TRAIN

2012 ◽  
Vol 11 (04) ◽  
pp. 709-721 ◽  
Author(s):  
QIAN-ZHEN SU ◽  
JIE YU ◽  
KAI-JUN YUAN ◽  
SHU-LIN CONG
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Pulse Train ◽  
Branching Ratio ◽  
Branching Ratios ◽  
Pulse Number ◽  
Molecular Ions ◽  
Quantum Wave ◽  
Energy Dependent

Above-threshold dissociation (ATD) process of the molecular ions HD+ steered by a femtosecond laser pulse train (LPT) is investigated theoretically using the time-dependent quantum wave packet method. Energy-dependent distributions of ATD fragments are analyzed by using an asymptotic-flow expression in the momentum space. It is found that fragment kinetic energy spectra shift to low energy region with increasing pulse number of LPT. The photofragment branching ratio between the 1sσg and 2pσu dissociation channels is sensitive to the pulse number of LPT. The momentum distribution of the ATD fragments is discussed in detail.

Preparation ZnO nanoparticles with Different Concentration by Laser Ablation in Liquid

2021 ◽  
Vol 39 (1B) ◽  
pp. 197-202
Author(s):  
Ghufran S. Jaber ◽  
Khawla S. Khashan ◽  
Maha J. Abbas
Keyword(s):  
Particle Size ◽  
Laser Ablation ◽  
Laser Pulse ◽  
Laser Energy ◽  
Average Particle Size ◽  
Spherical Shape ◽  
Pulse Number ◽  
Average Particle ◽  
Zno Nps ◽  
Laser Ablation In Liquid

The effects of varying laser pulse numbers on the fabricated of ZnONPs by pulsed laser ablation in deionized water of Zn-metal are investigated. The Nd: YAG laser at energy 600mJ prepared three samples by change the laser pulse number (100, 150, and 200). The results were collected and examined using an electron scanning microscope, XRD – diffraction, and transmission electron microscope. The result revealed the colloidal spherical shape and the homogeneous composition of the ZnO NPs. The nanoparticles resulted in different concentrations and sized distributions by changing the pulse number of a laser. The average particle size and the mass concentration of particle size increase with an increasing number of laser pulses by fixed the laser energy.

Mask-Based Microsphere Photolithography

2018 ◽  
Author(s):  
Chuang Qu ◽  
Edward C. Kinzel
Keyword(s):  
Ultraviolet Radiation ◽  
The Self ◽  
Photoresist Layer ◽  
Multiple Exposures ◽  
Self Assembled ◽  
Microsphere Array

Microsphere Photolithography (MPL) uses a self-assembled array of transparent microspheres to focus incident ultraviolet radiation and produce an array of photonic jets in photoresist. Typically, the microspheres are self-assembled directly on the photoresist layer and are removed after exposure during development. Reusing the microsphere array reduces the expense of the process. A mask is formed by transferring the self-assembled microsphere array to a transparent tape. This can be used for multiple exposures when pressed into contact with the photoresist. This paper demonstrates the use of this process to pattern infrared metasurface absorbers and discusses the effects of the mask-based MPL process on the metasurface performance.

Dependence of birefringence and residual stress near laser-induced cracks in fused silica on laser fluence and on laser-pulse number

1998 ◽  
Vol 37 (33) ◽  
pp. 7772 ◽  
Author(s):  
Faiz Dahmani ◽  
Ansgar W. Schmid ◽  
John C. Lambropoulos ◽  
Stephen Burns
Keyword(s):  
Residual Stress ◽  
Laser Pulse ◽  
Laser Fluence ◽  
Pulse Number ◽  
Fused Silica

scholarly journals Influence of Laser Pulse Number on the Ablation of Cemented Tungsten Carbides (WC-CoNi) with Different Grain Size

Lubricants ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 11 ◽  
Author(s):  
Shiqi Fang ◽  
Chia-Jui Hsu ◽  
Sven Klein ◽  
Luis Llanes ◽  
Dirk Bähre ◽  
...  
Keyword(s):  
Grain Size ◽  
Laser Pulse ◽  
Pulse Number ◽  
Tungsten Carbides ◽  
Different Grain Size

SELF-ASSEMBLED VOLUME GRATING IN SILICA GLASS INDUCED BY TIGHTLY FOCUSED FEMTOSECOND LASER PULSE

2009 ◽  
Vol 18 (04) ◽  
pp. 625-632
Author(s):  
ZHONGYI GUO ◽  
WEIQIANG DING ◽  
SHILIANG QU ◽  
JINGMIN DAI ◽  
SHUTIAN LIU
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Silica Glass ◽  
Femtosecond Pulses ◽  
Scanning Velocity ◽  
First Order ◽  
Diffractive Efficiency ◽  
Transparent Materials ◽  
Self Assembled

We report on self-assembled volume grating in silica glass induced by a tightly focused femtosecond laser pulse. The formation of volume grating is attributed to the multiple microexplosion in the transparent materials induced by the femtosecond pulses. The first order diffractive efficiency is greatly dependent on the energy of the pulses and the scanning velocity of the laser, and the highest reaches to nearly 30%.

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