Microraman Study of Laser Ablated Gaas

1994 ◽  
Vol 354 ◽  
Author(s):  
C. García ◽  
J. Jiménez ◽  
A.C. Prieto ◽  
J. Ramos ◽  
L.F. Sanz
Keyword(s):  
Chemical Composition ◽  
Structural Changes ◽  
Pulsed Laser ◽  
Optical Interferometry ◽  
Laser Beams ◽  
Surface Inspection ◽  
Dopant Distribution ◽  
Microraman Spectroscopy

AbstractMorphologic and structural changes induced by UV pulsed laser beams on GaAs are studied by means of surface inspection (optical interferometry) and MicroRaman spectroscopy. Crystal order and chemical composition (dopant distribution ) are shown to be changed by the ablation.

Acceleration characteristics of flyers driven by pulsed laser beams

2012 ◽  
Vol 24 (11) ◽  
pp. 2531-2536 ◽  
Author(s):  
王飞 Wang Fei ◽  
陈朗 Chen Lang ◽  
伍俊英 Wu Junying ◽  
孙崔源 Sun Cuiyuan
Keyword(s):  
Pulsed Laser ◽  
Laser Beams

scholarly journals Self-pinching of pulsed laser beams during filamentary propagation

2009 ◽  
Vol 17 (19) ◽  
pp. 16429 ◽  
Author(s):  
Carsten Brée ◽  
Ayhan Demircan ◽  
Stefan Skupin ◽  
Luc Bergé ◽  
Günter Steinmeyer
Keyword(s):  
Pulsed Laser ◽  
Laser Beams

scholarly journals Influence of substrate temperature and gas pressure on aluminum oxynitride coatings obtained by pulsed laser deposition

2017 ◽  
Vol 35 (1) ◽  
pp. 254-264
Author(s):  
Joanna Piwowarczyk ◽  
Roman Jędrzejewski ◽  
Jolanta Baranowska
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Substrate Temperature ◽  
Pulsed Laser Deposition ◽  
Total Pressure ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Aluminum Oxynitride ◽  
Negative Effect ◽  
Oxynitride Coatings

AbstractThe paper presents results of the investigation on the influence of deposition parameters, such as substrate temperature, total gas pressure and reactive gas composition on the structure, chemical composition and mechanical properties of aluminum oxynitride coatings obtained by pulsed laser deposition (PLD) method. Selection of process parameter ranges, which could be promising for aluminum oxynitride (ALON) coatings deposition, was the main objective of the work. Two series of experiments were carried out with varied pressure and temperature. It was found that from the chemical composition viewpoint, the most promising are atmospheres containing 20 % to 40 % oxygen. The nitrogen to oxygen ratios in the coatings can be controlled by increasing the total pressure or substrate temperature. However, increasing the pressure has a negative effect on the O + N:Al ratio, mechanical properties and quality of the coatings. The influence of temperature is much less drastic and more controllable. Increasing the deposition temperature is much more beneficial since it improves the mechanical properties and can compensate to some extent the negative effect of the total pressure. From the coating quality viewpoint, it is possible to establish an optimum temperature range for which the coatings are characterized by a compact structure and a limited number of droplets.

Electronic and structural changes induced by irradiation or annealing in pulsed laser deposited As50Se50 films. An XPS and UPS study

2007 ◽  
Vol 68 (5-6) ◽  
pp. 906-910 ◽  
Author(s):  
M. Kalyva ◽  
A. Siokou ◽  
S.N. Yannopoulos ◽  
P. Ne˘mec ◽  
M. Frumar
Keyword(s):  
Structural Changes ◽  
Pulsed Laser
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