Time-resolved optical emission studies on the laser ablation of a graphite target: The effects of ambient gases

2005 ◽  
Vol 97 (11) ◽  
pp. 113103 ◽  
Author(s):  
Hye Sun Park ◽  
Sang Hwan Nam ◽  
Seung Min Park
Keyword(s):  
Laser Ablation ◽  
Optical Emission ◽  
Graphite Target ◽  
Time Resolved ◽  
Ambient Gases ◽  
Emission Studies

scholarly journals Dynamics of Transient Plasmas Generated by ns Laser Ablation of Memory Shape Alloys

2020 ◽  
Author(s):  
Stefan Andrei Irimiciuc ◽  
Norina Forna ◽  
Andrei Agop ◽  
Maricel Agop ◽  
Stefan Toma ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser Deposition ◽  
Emission Spectroscopy ◽  
Pulsed Laser ◽  
Optical Emission ◽  
Laser Deposition ◽  
Global Dynamics ◽  
Time Resolved ◽  
Laser Ablation Process ◽  
Key Techniques

Understanding the underline fundamental mechanism behind experimental and industrial technologies embodies one of the foundations of the advances and tailoring new materials. With the pulsed laser deposition being one of the key techniques for obtaining complex biocompatible materials with controllable stoichiometry, there is need for experimental and theoretical advancements towards understanding the dynamics of multi component plasmas. Here we investigate the laser ablation process on Cu-Mn-Al and Fe-Mn-Si by means of space-and time-resolved optical emission spectroscopy and fast camera imaging. In a fractal paradigm the space–time homographic transformations were correlated with the global dynamics of the ablation plasmas.

scholarly journals Generation and evolution of plasma during femtosecond laser ablation of silicon in different ambient gases

2013 ◽  
Vol 31 (3) ◽  
pp. 539-545 ◽  
Author(s):  
Zhandong Chen ◽  
Qiang Wu ◽  
Ming Yang ◽  
Baiquan Tang ◽  
Jianghong Yao ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Emission Spectra ◽  
Femtosecond Laser Ablation ◽  
Coulomb Repulsion ◽  
Time Resolved ◽  
Monovalent Ions ◽  
Ambient Gases ◽  
Ambient Gas ◽  
Deposition Effect

AbstractGeneration and evolution of plasma during femtosecond laser ablation of silicon are studied by steady-state and time-resolved spectroscopy in air, N2, SF6, and under vacuum. The plasma is generated faster than 200 ps (time resolution of our experiment) after excitation and mainly contains atoms and monovalent ions of silicon. Time-resolved spectra prove that silicon ions are faster than the silicon atoms which may be attributed to Coulomb repulsion and a local electric field when they are ejected from the silicon surface. During plasma evolution, ambient gas causes a confinement effect that enhances the dissociation of ambient gas molecules and the re-deposition of the removed material and leads to higher intensity and longer lifetime of the emission spectra. In SF6, a chemical reaction increases the plasma density and weakens the re-deposition effect. The different processes during plasma evolution strongly influence microstructure formation.

Optical Detection of Slow Excited Neutrals in Plasma-Assisted Excimer Laser Ablation

1995 ◽  
Vol 397 ◽  
Author(s):  
P. Mukherjee ◽  
P. Sakthivel ◽  
S. Witanachchi
Keyword(s):  
Laser Ablation ◽  
Excimer Laser ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Temporal Dynamics ◽  
Optical Emission ◽  
Ring Electrode ◽  
Time Resolved ◽  
Excimer Laser Ablation ◽  
Slow Moving

ABSTRACTThe observation of a slow optically excited component in the excimer laser-ablated YBCO plume due to the presence of a biased ring electrode is reported. The temporal dynamics of the plume were investigated by using time-of-flight (TOF) optical emission spectroscopy (OES). Time-resolved emission signals reveal excitation and resultant fluorescence from slow-moving plume species in the presence of the discharge.

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