scholarly journals Plasma dynamics and structural modifications induced by femtosecond laser pulses in quartz

2012 ◽  
Vol 258 (23) ◽  
pp. 9389-9393 ◽  
Author(s):  
J. Hernandez-Rueda ◽  
D. Puerto ◽  
J. Siegel ◽  
M. Galvan-Sosa ◽  
J. Solis
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Plasma Dynamics ◽  
Structural Modifications

Plasma dynamics of water breakdown at a water surface induced by femtosecond laser pulses

2006 ◽  
Vol 88 (26) ◽  
pp. 261109 ◽  
Author(s):  
C. Sarpe-Tudoran ◽  
A. Assion ◽  
M. Wollenhaupt ◽  
M. Winter ◽  
T. Baumert
Keyword(s):  
Femtosecond Laser ◽  
Water Surface ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Plasma Dynamics

Comparative Study of Plasmas Obtained by Femtosecond Laser Pulses Ablation in Si and SiO2

2020 ◽  
Author(s):  
Gustavo A. Torchia ◽  
Fernando Alvira
Keyword(s):  
Femtosecond Laser ◽  
Dielectric Material ◽  
Imaging Spectroscopy ◽  
Theoretical Models ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Extinction Time ◽  
Plasma Dynamics ◽  
Electronic Density

We analyzed the ablation dynamics for Silicon atoms located in two different environments. Experiments were done with semiconductor (silicon wafer) and a dielectric material (fused silica). We point out some difference in plasma dynamics for Silicon in both environments. Those results can not be explained with current and accepted theoretical models, which asseverate that after the femtosecond laser pulse interact with the surface, the process evolve as metal regardless the kind of material under excitation. <br>Electronic density and temperature were measured with temporal resolution on SiO2 and Si samples by using standard fs LIBS imaging spectroscopy. Extinction time of both plasmas is different depending on the kind of sample under irradiation. Lifetime for plasma obtained in dielectric sample is shorter than that of semiconductor. The main reason to explain this behavior is related to the deep defect induced in the dielectric (fused silica) gap by the femtosecond process; these centers act as sink for the free electron promoted by the laser interaction from the valence band to the plasma, so for dielectrics, shorter lifetime plasmas are obtained when femtosecond pulse irradiation is conducted.<br><br>

Comparative Study of Plasmas Obtained by Femtosecond Laser Pulses Ablation in Si and SiO2

2020 ◽  
Author(s):  
Gustavo A. Torchia ◽  
Fernando Alvira
Keyword(s):  
Femtosecond Laser ◽  
Dielectric Material ◽  
Imaging Spectroscopy ◽  
Theoretical Models ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Extinction Time ◽  
Plasma Dynamics ◽  
Electronic Density

We analyzed the ablation dynamics for Silicon atoms located in two different environments. Experiments were done with semiconductor (silicon wafer) and a dielectric material (fused silica). We point out some difference in plasma dynamics for Silicon in both environments. Those results can not be explained with current and accepted theoretical models, which asseverate that after the femtosecond laser pulse interact with the surface, the process evolve as metal regardless the kind of material under excitation. <br>Electronic density and temperature were measured with temporal resolution on SiO2 and Si samples by using standard fs LIBS imaging spectroscopy. Extinction time of both plasmas is different depending on the kind of sample under irradiation. Lifetime for plasma obtained in dielectric sample is shorter than that of semiconductor. The main reason to explain this behavior is related to the deep defect induced in the dielectric (fused silica) gap by the femtosecond process; these centers act as sink for the free electron promoted by the laser interaction from the valence band to the plasma, so for dielectrics, shorter lifetime plasmas are obtained when femtosecond pulse irradiation is conducted.<br><br>

Inorganic-organic Hybrid Materials for Real 3-D Sub-νm Lithography

2003 ◽  
Vol 780 ◽  
Author(s):  
R. Houbertz ◽  
J. Schulz ◽  
L. Fröhlich ◽  
G. Domann ◽  
M. Popall ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Sol Gel ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Hybrid Polymer ◽  
Organic Hybrid ◽  
Two Photon ◽  
Applied Technology ◽  
Scale Structures ◽  
Sol Gel Synthesis

AbstractReal 3-D sub-νm lithography was performed with two-photon polymerization (2PP) using inorganic-organic hybrid polymer (ORMOCER®) resins. The hybrid polymers were synthesized by hydrolysis/polycondensation reactions (modified sol-gel synthesis) which allows one to tailor their material properties towards the respective applications, i.e., dielectrics, optics or passivation. Due to their photosensitive organic functionalities, ORMOCER®s can be patterned by conventional photo-lithography as well as by femtosecond laser pulses at 780 nm. This results in polymerized (solid) structures where the non-polymerized parts can be removed by conventional developers.ORMOCER® structures as small as 200 nm or even below were generated by 2PP of the resins using femtosecond laser pulses. It is demonstrated that ORMOCER®s have the potential to be used in components or devices built up by nm-scale structures such as, e.g., photonic crystals. Aspects of the materials in conjunction to the applied technology are discussed.

Ablation of metals with femtosecond laser pulses

2001 ◽  
Author(s):  
K. H. Leong ◽  
T. Y. Plew ◽  
R. L. Maynard ◽  
A. A. Said ◽  
L. A. Walker
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Picosecond Single-Photon and Femtosecond Two-Photon Pulsed Laser Stimulation for IC Characterization and Failure Analysis

2009 ◽  
Author(s):  
V. Pouget ◽  
E. Faraud ◽  
K. Shao ◽  
S. Jonathas ◽  
D. Horain ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Single Photon ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Laser Stimulation ◽  
Two Photon ◽  
Resolution Improvement ◽  
Ultrashort Laser

Abstract This paper presents the use of pulsed laser stimulation with picosecond and femtosecond laser pulses. We first discuss the resolution improvement that can be expected when using ultrashort laser pulses. Two case studies are then presented to illustrate the possibilities of the pulsed laser photoelectric stimulation in picosecond single-photon and femtosecond two-photon modes.

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