Optimization of laser energy deposition for single-shot high aspect-ratio microstructuring of thick BK7 glass

2016 ◽  
Vol 120 (1) ◽  
pp. 013102 ◽  
Author(s):  
Valerio Garzillo ◽  
Vytautas Jukna ◽  
Arnaud Couairon ◽  
Robertas Grigutis ◽  
Paolo Di Trapani ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Energy Deposition ◽  
Laser Energy ◽  
Single Shot ◽  
Bk7 Glass

scholarly journals Single-shot ultrafast laser processing of high-aspect-ratio nanochannels using elliptical Bessel beams

2017 ◽  
Vol 42 (21) ◽  
pp. 4307 ◽  
Author(s):  
R. Meyer ◽  
M. Jacquot ◽  
R. Giust ◽  
J. Safioui ◽  
L. Rapp ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Laser Processing ◽  
Ultrafast Laser ◽  
Single Shot ◽  
Bessel Beams

scholarly journals Reconstructing of Embedded High-Aspect-Ratio Nano-Voids Generated by Ultrafast Laser Bessel Beams

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 671 ◽  
Author(s):  
Tianqu Chen ◽  
Guodong Zhang ◽  
Yishan Wang ◽  
Xuelong Li ◽  
Razvan Stoian ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Laser Energy ◽  
Focal Region ◽  
Bessel Beams ◽  
Time Saving ◽  
Strong Light ◽  
Nanoscale Structures ◽  
Close Relationship

Ultrafast non-diffractive Bessel laser beams provide strong light confinement and show robust advantages for fabricating high-aspect-ratio nanoscale structures inside transparent materials. They take the form of nanoscale voids with typical diameters well below the wavelength and aspect ratio of more than 1000. Delivering 3D morphologies of such nanoscale voids is an important issue to evaluate the result for fabrication. However, the characterization of such laser-induced structures is a difficult task. Here, an accurate and time-saving tomography-like methodology is proposed and adopted for reconstructing the morphology of high-aspect-ratio nano-holes. The technique allows an accurate assertion of laser parameters and position on nano-structured features. The reconstructed configuration reveals that nanoholes morphologies have a close relationship with energy distribution in the focal region. It suggests that the configuration of micro-explosion can be controlled by laser energy deposition in the process of laser-matter interaction down to the nanoscale.

scholarly journals The investigation of heating and compression of high-aspect ratio targets with ‘Delfin-1’

1984 ◽  
Vol 2 (1) ◽  
pp. 103-119 ◽  
Author(s):  
N. G. Basov ◽  
A. E. Danilov ◽  
M. P. Kalashnikov ◽  
B. V. Kruglov ◽  
Yu A. Mikhailov ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Final Stage ◽  
Neutron Yield ◽  
Laser Energy ◽  
Experimental Results ◽  
Laser Shot ◽  
Maximum Compression ◽  
Plasma Corona

Experimental results on the compression of shell targets with aspect ratio A = 150–250 in the “Delfin-1” installation are reported. The absorbed laser energy was 0·3 to 0·5 kJ. The maximum compression was 3·5 × 103, the velocity of target compression at the final stage was 2·6 × 107 cm/s, neutron yield was 106 to 107 D-D neutrons per laser shot. The appearence of plasma corona filamentation correlated with compression stability distruction.

Optimization of the parameters of high-aspect-ratio targets for laser thermonuclear fusion experiments with a laser energy of 1–2 kJ

1987 ◽  
Vol 17 (11) ◽  
pp. 1458-1464
Author(s):  
Sergei Yu Gus'kov ◽  
A E Danilov ◽  
Yu A Zakharenkov ◽  
I G Lebo ◽  
Yu A Mikhaĭlov ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Laser Energy ◽  
Thermonuclear Fusion ◽  
Laser Thermonuclear Fusion ◽  
Fusion Experiments

The Interactions of Microhole Sidewall With Plasma induced by Femtosecond Laser Ablation in High-Aspect-Ratio Microholes

2012 ◽  
Vol 134 (1) ◽  
Author(s):  
Benxin Wu ◽  
Sha Tao ◽  
Shuting Lei
Keyword(s):  
Laser Ablation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Material Removal ◽  
Laser Energy ◽  
Spatial Scales ◽  
Femtosecond Laser Ablation ◽  
Plasma Energy ◽  
Direct Laser ◽  
Fs Laser

High-aspect-ratio microholes have many important applications, but their drilling is very challenging. Femtosecond (fs) laser ablation provides a potential solution, but involves many complicated physical processes that have not been well understood, which have hindered its practical application. One of these is that the plasma induced by laser ablation at the hole bottom will transfer some of its energy to the hole sidewall as it expands in the microhole. The plasma–sidewall interaction has been rarely studied in literature, and it is still not clear if or not the energy transferred from the plasma is sufficient to cause significant material removal from the sidewall. Direct time-resolved observations are extremely difficult due to the small temporal/spatial scales and the spatial constraint inside the hole, while the sidewall characterization after laser ablation is difficult to distinguish between the possible material removal due to plasma energy transfer and that due to direct laser energy absorption by the sidewall. In this paper, a physics-based model is applied as the investigation tool to study the plasma–sidewall interaction in fs laser drilling of high-aspect-ratio microholes. It has been found that for the studied conditions the energy transferred from the plasma is not sufficient to cause significant material removal from the sidewall through any thermally induced phase change process.

Single-shot high aspect ratio bulk nanostructuring of fused silica using chirp-controlled ultrafast laser Bessel beams

2014 ◽  
Vol 104 (2) ◽  
pp. 021107 ◽  
Author(s):  
M. K. Bhuyan ◽  
P. K. Velpula ◽  
J. P. Colombier ◽  
T. Olivier ◽  
N. Faure ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Fused Silica ◽  
Ultrafast Laser ◽  
Single Shot ◽  
Bessel Beams

scholarly journals High aspect ratio nanochannel machining using single shot femtosecond Bessel beams

2010 ◽  
Vol 97 (8) ◽  
pp. 081102 ◽  
Author(s):  
M. K. Bhuyan ◽  
F. Courvoisier ◽  
P. A. Lacourt ◽  
M. Jacquot ◽  
R. Salut ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Single Shot ◽  
Bessel Beams
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