Etude du phénomène de double ablation laser PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Etude du phénomène de double ablation laser PDF full book. Access full book title Etude du phénomène de double ablation laser by Lætitia Lambert-Basa. Download full books in PDF and EPUB format.
Author: Lætitia Lambert-Basa
Publisher:
ISBN:
Category :
Languages : fr
Pages : 141
Get Book Here
Book Description
L'OBJECTIF DE CETTE ETUDE EST LA REALISATION DE COUCHES MINCES DE CRYOLITHE PAR ABLATION LASER SUR SUBSTRAT DE SILICIUM. NOUS AVONS UTILISE UN LASER A EXCIMERES KRF A 248 NM, PERMETTANT DES FLUENCES DE 0,5 A 5 J/CM 2. LES PREMIERS FILMS REALISES SELON LE SCHEMA CLASSIQUE DE LA PLD (SIMPLE ABLATION) PRESENTENT UN ETAT DE SURFACE TRES MAUVAIS, LES RENDANT INEXPLOITABLES POUR DES APPLICATIONS OPTIQUES. UN DEUXIEME DISPOSITIF EXPERIMENTAL A ETE MIS AU POINT, BASE SUR LE PRINCIPE DE LA DOUBLE ABLATION : DEUX CIBLES FAISANT ENTRE ELLES UN ANGLE D'ENVIRON 120 DEGRES SONT IRRADIEES SIMULTANEMENT PAR DEUX FAISCEAUX D'ENERGIES EGALES. LES DEUX PANACHES D'ABLATION SE RENCONTRENT A 15 MILLIMETRES DES CIBLES, ET L'EFFET DES COLLISIONS ENTRE LES PARTICULES ENTRAINE UNE REDISTRIBUTION DE LEURS TRAJECTOIRES SELON UNE DIRECTION MEDIANE, SUR LAQUELLE EST PLACE LE SUBSTRAT. CETTE TECHNIQUE DONNE D'EXCELLENTS RESULTATS : COMPOSITION PROCHE DE CELLE DES CIBLES, FILMS FAIBLEMENT CRISTALLISES, DIMINUTION D'UN FACTEUR 10 DE LA DENSITE DE GOUTTELETTES D'UNE TAILLE INFERIEURE A 1 MICRON, ET ELIMINATION TOTALE DES GOUTTELETTES DE TAILLE SUPERIEURE. UNE COMPARAISON A EGALEMENT ETE EFFECTUEE AVEC LES FILMS REALISES PAR EVAPORATION THERMIQUE, MONTRANT QUE LA DOUBLE ABLATION PERMET DE RESOUDRE CERTAINS DES PROBLEMES RENCONTRES DANS LE CADRE DE CETTE TECHNIQUE. PARALLELEMENT, UNE ETUDE DES PANACHES D'ABLATION A ETE REALISEE, ESSENTIELLEMENT PAR IMAGERIE CCD, PERMETTANT DE VISUALISER L'EXPANSION DES PANACHES, NOTAMMENT DANS LE CAS DE LA DOUBLE ABLATION. L'IMPORTANCE DES EFFETS LIES A LA PRESENCE DE CHAMPS ELECTRIQUES PRESENTS AU MOMENT DE LA COLLISION A ETE MISE EN EVIDENCE.
Author: Lætitia Lambert-Basa
Publisher:
ISBN:
Category :
Languages : fr
Pages : 141
Get Book Here
Book Description
L'OBJECTIF DE CETTE ETUDE EST LA REALISATION DE COUCHES MINCES DE CRYOLITHE PAR ABLATION LASER SUR SUBSTRAT DE SILICIUM. NOUS AVONS UTILISE UN LASER A EXCIMERES KRF A 248 NM, PERMETTANT DES FLUENCES DE 0,5 A 5 J/CM 2. LES PREMIERS FILMS REALISES SELON LE SCHEMA CLASSIQUE DE LA PLD (SIMPLE ABLATION) PRESENTENT UN ETAT DE SURFACE TRES MAUVAIS, LES RENDANT INEXPLOITABLES POUR DES APPLICATIONS OPTIQUES. UN DEUXIEME DISPOSITIF EXPERIMENTAL A ETE MIS AU POINT, BASE SUR LE PRINCIPE DE LA DOUBLE ABLATION : DEUX CIBLES FAISANT ENTRE ELLES UN ANGLE D'ENVIRON 120 DEGRES SONT IRRADIEES SIMULTANEMENT PAR DEUX FAISCEAUX D'ENERGIES EGALES. LES DEUX PANACHES D'ABLATION SE RENCONTRENT A 15 MILLIMETRES DES CIBLES, ET L'EFFET DES COLLISIONS ENTRE LES PARTICULES ENTRAINE UNE REDISTRIBUTION DE LEURS TRAJECTOIRES SELON UNE DIRECTION MEDIANE, SUR LAQUELLE EST PLACE LE SUBSTRAT. CETTE TECHNIQUE DONNE D'EXCELLENTS RESULTATS : COMPOSITION PROCHE DE CELLE DES CIBLES, FILMS FAIBLEMENT CRISTALLISES, DIMINUTION D'UN FACTEUR 10 DE LA DENSITE DE GOUTTELETTES D'UNE TAILLE INFERIEURE A 1 MICRON, ET ELIMINATION TOTALE DES GOUTTELETTES DE TAILLE SUPERIEURE. UNE COMPARAISON A EGALEMENT ETE EFFECTUEE AVEC LES FILMS REALISES PAR EVAPORATION THERMIQUE, MONTRANT QUE LA DOUBLE ABLATION PERMET DE RESOUDRE CERTAINS DES PROBLEMES RENCONTRES DANS LE CADRE DE CETTE TECHNIQUE. PARALLELEMENT, UNE ETUDE DES PANACHES D'ABLATION A ETE REALISEE, ESSENTIELLEMENT PAR IMAGERIE CCD, PERMETTANT DE VISUALISER L'EXPANSION DES PANACHES, NOTAMMENT DANS LE CAS DE LA DOUBLE ABLATION. L'IMPORTANCE DES EFFETS LIES A LA PRESENCE DE CHAMPS ELECTRIQUES PRESENTS AU MOMENT DE LA COLLISION A ETE MISE EN EVIDENCE.
Author:
Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 796
Get Book Here
Book Description
Author: Paras N. Prasad
Publisher: John Wiley & Sons
ISBN: 0471465399
Category : Science
Languages : en
Pages : 622
Get Book Here
Book Description
Paras Prasad’s text provides a basic knowledge of a broad range of topics so that individuals in all disciplines can rapidly acquire the minimal necessary background for research and development in biophotonics. Introduction to Biophotonics serves as both a textbook for education and training as well as a reference book that aids research and development of those areas integrating light, photonics, and biological systems. Each chapter contains a topic introduction, a review of key data, and description of future directions for technical innovation. Introduction to Biophotonics covers the basic principles of Optics Optical spectroscopy Microscopy Each section also includes illustrated examples and review questions to test and advance the reader’s knowledge. Sections on biosensors and chemosensors, important tools for combating biological and chemical terrorism, will be of particular interest to professionals in toxicology and other environmental disciplines. Introduction to Biophotonics proves a valuable reference for graduate students and researchers in engineering, chemistry, and the life sciences.
Author: Canadian Dental Association
Publisher:
ISBN:
Category : Dentistry
Languages : en
Pages : 1116
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 760
Get Book Here
Book Description
Author: Wolfgang Demtröder
Publisher: Springer
ISBN: 3642538592
Category : Science
Languages : en
Pages : 510
Get Book Here
Book Description
Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femtosecond lasers) and parametric oscillators, coherent matter waves, Doppler-free Fourier spectroscopy with optical frequency combs, interference spectroscopy, quantum optics, the interferometric detection of gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.
Author: Marin Alexe
Publisher: Springer Science & Business Media
ISBN: 9783540210498
Category : Science
Languages : en
Pages : 524
Get Book Here
Book Description
During the past decade direct wafer bonding has developed into a mature materials integration technology. This book presents state-of-the-art reviews of the most important applications of wafer bonding written by experts from industry and academia. The topics include bonding-based fabrication methods of silicon-on-insulator, photonic crystals, VCSELs, SiGe-based FETs, MEMS together with hybrid integration and laser lift-off. The non-specialist will learn about the basics of wafer bonding and its various application areas, while the researcher in the field will find up-to-date information about this fast-moving area, including relevant patent information.
Author: Golla Eranna
Publisher: CRC Press
ISBN: 1482232812
Category : Science
Languages : en
Pages : 432
Get Book Here
Book Description
Silicon, as a single-crystal semiconductor, has sparked a revolution in the field of electronics and touched nearly every field of science and technology. Though available abundantly as silica and in various other forms in nature, silicon is difficult to separate from its chemical compounds because of its reactivity. As a solid, silicon is chemically inert and stable, but growing it as a single crystal creates many technological challenges. Crystal Growth and Evaluation of Silicon for VLSI and ULSI is one of the first books to cover the systematic growth of silicon single crystals and the complete evaluation of silicon, from sand to useful wafers for device fabrication. Written for engineers and researchers working in semiconductor fabrication industries, this practical text: Describes different techniques used to grow silicon single crystals Explains how grown single-crystal ingots become a complete silicon wafer for integrated-circuit fabrication Reviews different methods to evaluate silicon wafers to determine suitability for device applications Analyzes silicon wafers in terms of resistivity and impurity concentration mapping Examines the effect of intentional and unintentional impurities Explores the defects found in regular silicon-crystal lattice Discusses silicon wafer preparation for VLSI and ULSI processing Crystal Growth and Evaluation of Silicon for VLSI and ULSI is an essential reference for different approaches to the selection of the basic silicon-containing compound, separation of silicon as metallurgical-grade pure silicon, subsequent purification, single-crystal growth, and defects and evaluation of the deviations within the grown crystals.
Author: José-Luis Todoli
Publisher: Elsevier
ISBN: 0080932274
Category : Science
Languages : en
Pages : 301
Get Book Here
Book Description
Inductively coupled plasma atomic or mass spectrometry is one of the most common techniques for elemental analysis. Samples to be analyzed are usually in the form of solutions and need to be introduced into the plasma by means of a sample introduction system, so as to obtain a mist of very fine droplets. Because the sample introduction system can be a limiting factor in the analytical performance, it is crucial to optimize its design and its use. It is the purpose of this book to provide fundamental knowledge along with practical instructions to obtain the best out of the technique. - Fundamental as well as practical character - Troubleshooting section - Flow charts with optimum systems to be used for a given application
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
Get Book Here
Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
