Download or read book Investigation of Selective Optical Properties of Si SiO2 Nanostructures Generated by Pulsed Laser Ablation As deposited and Post treated written by Meisam Moghareh Abed and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon and its derivatives like SiO2 are essential materials for industrial applications such as semiconductors, optoelectronics, and telecommunication. Optical properties of a large group of silicon/silica nanofibrous thin films are studied. A picosecond pulse laser was employed for indirect deposition of ablated silicon on glass substrates. Prominent parameters such as laser power, repetition rate, pulse duration, and scanning speed were changed to vary the structural and compositional properties of synthesized nanofibrous thin films. Transmission and specular reflection measurements along with material characterization techniques, Raman, FTIR XPS, and XRD were employed for better interpretation of the results. Three studies are included in this research. First, exploration of the effect of manufacturing parameters as frequency, power, pulse duration and scanning speed on optical properties of samples generated. By and large, an increase in the values for repetition rate and scanning speed produces a corresponding increase in optical data intensity, while an increase in power and pulse duration leads to a drop in the spectra. The results show that the degree of oxidation and the inherent porous structure is driving the light interaction in thin samples, as indicated by the changes in intensity or spectrum shape. The second study looks into the influence of post heat treatment on the optical properties of samples prepared by frequency variation. Samples were heated up to 400°C and 1000°C and cooled down to room temperature for measurements. The inverse relationship of annealing temperatures on Vis-range reflection spectra to increase and decrease the intensity was confirmed. These improvements are attributed to crystalline and amorphous lattice structures and elemental composition. The third study focuses on the emission of a heated sample, to 200°C and 350°C while data is collected at the elevated temperatures. Results show the emission amplifying effect of nanofibrous structure and its density as well as oxidation level at NIR (Near Infra-Red) range reflection.
Download or read book Synthesis Electronic and Optical Properties of Si Nanostructures written by Long Ngoc Dinh and published by . This book was released on 1996 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agriculture Poland written by and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Ablation in Liquids written by Guowei Yang and published by CRC Press. This book was released on 2012-02-22 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the fundamental concepts and physical and chemical aspects of pulsed laser ablation of solid targets in liquid environments and its applications in the preparation of nanomaterials and fabrication of nanostructures. The areas of focus include basic thermodynamic and kinetic processes of laser ablation in liquids, and its applic
Download or read book The Physics and Chemistry of SiO2 and the Si SiO2 Interface 2 written by B.E. Deal and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first international symposium on the subject "The Physics and Chemistry of Si02 and the Si-Si02 Interface," organized in association with the Electrochemical Society, Inc. , was held in Atlanta, Georgia on May 15- 20, 1988. This symposium contained sixty papers and was so successful that the sponsoring divisions decided to schedule it on a regular basis every four years. Thus, the second symposium on "The Physics and Chemistry of Si02 and the Si02 Interface was held May 18-21, 1992 in St. Louis, Missouri, again sponsored by the Electronics and Dielectrics Science and Technology Divisions of The Electrochemical Society. This volume contains manuscripts of most of the fifty nine papers presented at the 1992 symposium, and is divided into eight chapters - approximating the organization of the symposium. Each chapter is preceded with an introduction by the session organizers. It is appropriate to provide a general assessment of the current status and understanding of the physics and chemistry of Si02 and the Si02 interface before proceeding with a brief overview of the individual chapters. Semiconductor devices have continued to scale down in both horizontal and vertical dimensions. This has resulted in thinner gate and field oxides as well as much closer spacing of individual device features. As a result, surface condition, native oxide composition, and cleaning and impurity effects now provide a much more significant contribution to the properties of oxides and their interfaces.
Download or read book Nanostructured Si SiO2 Quantum Wells written by Toshio Takeuchi and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motivation for developing light-emitting devices on an indirect transition semiconductor such as silicon has been widely discussed for Si/SiO2 nanostructures. In this chapter, we report on the fabrication of Si/SiO2 quantum-confined amorphous nanostructured films and their optical properties. The Si/SiO2 nanostructures comprising amorphous Si, SiO2, and Si/SiO2 multilayers are grown using ultrahigh vacuum radio frequency magnetron sputtering. Optical absorption coefficients of the Si/SiO2 nanostructures are evaluated with regard to tentative integrated Si thicknesses. Optical energy band gaps of the Si/SiO2 multilayer films are in accordance with the effective mass theory and described as E0¬†=¬†1.61¬†+¬†0.75d,àí2 eV at the Si layer-integrated thicknesses ranging from 0.5 to 6¬†nm. Quantum confinement effects in the Si/SiO2 nanostructures are inferred from optical transmittance and reflectance spectra. The rapid-thermal-annealed Si/SiO2 multilayer films demonstrate the intensified photoluminescence at ~1.45¬†eV due to the formation of nanocrystalline silicon. The temperature dependence of the nanocrystalline luminescence intensity shows the nonmonotonous behavior which is interpreted invoking the Kapoor model.
Download or read book The Physics of SiO2 and Its Interfaces written by Sokrates T. Pantelides and published by Elsevier. This book was released on 2013-09-17 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Physics of SiO2 and Its Interfaces covers the proceedings of the International Topical Conference on the Physics of SiO2 and its Interfaces, held at the IBM Thomas J. Watson Research Center, Yorktown Heights, New York on March 22-24, 1978. The book focuses on the properties, reactions, transformations, and structures of silicon dioxide (SiO2). The selection first discusses the electronic properties of vitreous SiO2 and small polaron formation and motion of holes in a-SiO2. Discussions focus on mobility edges and polarons, deep states in the gap, and excitons. The text also ponders on field-dependent hole and exciton transport in SiO2 and electron emission from SiO2 into vacuum. The publication takes a look at the electronic structures of crystalline and amorphous SiO2; band structures and electronic properties of SiO2; and optical absorption spectrum of SiO2. The text also tackles chemical bond and related properties of SiO2; topological effects on the band structure of silica; and properties of localized SiO2 clusters in layers of disordered silicon on silver. The selection is a good reference for physicists and readers interested in the physics of silicon dioxide.
Download or read book Characteristics of Si Nanoparticles by Laser Ablation written by Uday Nayef and published by LAP Lambert Academic Publishing. This book was released on 2012-02 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this work is to provide information associated with the optical, structural and morphological properties of Si nanoparticles needed to accomplish novel applications. Chapters 1 deal with a short literature overview of the research on Si nanoparticles and introduce the state-of-the-art in the synthesis, properties and applications of Si nanoparticles. In Chapter 2, the experimental procedures for synthesizing and modifying Si nanaoparticles thin films are described. In this chapter concentrates on the description of the PLA technique for fabricating Si nanoparticles films and then discusses which diagnostic tools to examine these parameters. This leads to a natural demarcation of the analytical tools, into those for examining the spectroscopy, the structural and surface morphology properties of the deposited films. The chapter ends with a list of the instrumentation used in the experimental work. In Chapter 3, the experimental observations, calculations and explanations of the findings are discussed. Finally, the conclusions drawn in the work are presented in Chapter 4.
Download or read book Optical Properties of Ion Beam Synthesized Si Nanocrystals in SiO 2 written by Mark L. Brongersma and published by . This book was released on 1998 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Properties of Si SiO2 Interfaces by Linear and Nonlinear Optical Techniques written by Jih-Fu Trevor Wang and published by . This book was released on 2001 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Properties of Si SiO2 Interfaces by Linear and Nonlinear Optical Techniques written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to understand the physics of (001)Si-SiO data can be realized by the SBHM. From the SHG analysis we find effective angles of incidence and observation of about 12°, indicating that the SHG intensity originates at the Si side of the interface. This work further demonstrates the advantages of SBHM for interpreting SHG data with respect to conventional approaches. By expressing nonlinear polarizations in terms of complex hyperpolarizabilities associated with each of bonds in a unit cell, the description is not only much simpler but also provides more physical information and insight that can otherwise be obtained on a microscopic scale.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optically Induced Nanostructures written by Karsten König and published by Walter de Gruyter GmbH & Co KG. This book was released on 2015-05-19 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructuring of materials is a task at the heart of many modern disciplines in mechanical engineering, as well as optics, electronics, and the life sciences. This book includes an introduction to the relevant nonlinear optical processes associated with very short laser pulses for the generation of structures far below the classical optical diffraction limit of about 200 nanometers as well as coverage of state-of-the-art technical and biomedical applications. These applications include silicon and glass wafer processing, production of nanowires, laser transfection and cell reprogramming, optical cleaning, surface treatments of implants, nanowires, 3D nanoprinting, STED lithography, friction modification, and integrated optics. The book highlights also the use of modern femtosecond laser microscopes and nanoscopes as novel nanoprocessing tools.
Download or read book Acts of the General Assembly of His Majesty s Province of New Brunswick written by New Brunswick and published by . This book was released on 1875 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compound Semiconductor Photonics written by Chua Soo-Jin and published by CRC Press. This book was released on 2020-03-26 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceeding is a collection of selected papers presented at Symposium O of Compound Semiconductor Photonics in the International Conference on Materials for Advanced Technology (ICMAT), which was held in Singapore from 28 June to 3 July 2009. The symposium covers a wide range of topics from fundamental semiconductor materials study to photonic device fabrication and application. The papers collected are of recent progress in the active and wide range of semiconductor photonics research. They include materials-related papers on III-As/P, III-nitride, quantum dot/wire/dash growth, ZnO, and chalcogenide, and devices-related papers on photonic crystals, VCSEL, quantum dot/dash lasers, LEDs, waveguides, solar cells and heterogeneous integrat
Download or read book Silicon Nanocrystals written by Lorenzo Pavesi and published by John Wiley & Sons. This book was released on 2010-02-02 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique collection of knowledge represents a comprehensive treatment of the fundamental and practical consequences of size reduction in silicon crystals. This clearly structured reference introduces readers to the optical, electrical and thermal properties of silicon nanocrystals that arise from their greatly reduced dimensions. It covers their synthesis and characterization from both chemical and physical viewpoints, including ion implantation, colloidal synthesis and vapor deposition methods. A major part of the text is devoted to applications in microelectronics as well as photonics and nanobiotechnology, making this of great interest to the high-tech industry.
Download or read book Principles of Surface Enhanced Raman Spectroscopy written by Eric Le Ru and published by Elsevier. This book was released on 2008-11-17 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: SERS was discovered in the 1970s and has since grown enormously in breadth, depth, and understanding. One of the major characteristics of SERS is its interdisciplinary nature: it lies at the boundary between physics, chemistry, colloid science, plasmonics, nanotechnology, and biology. By their very nature, it is impossible to find a textbook that will summarize the principles needed for SERS of these rather dissimilar and disconnected topics. Although a basic understanding of these topics is necessary for research projects in SERS with all its many aspects and applications, they are seldom touched upon as a coherent unit during most undergraduate studies in physics or chemistry. This book intends to fill this existing gap in the literature. It provides an overview of the underlying principles of SERS, from the fundamental understanding of the effect to its potential applications. It is aimed primarily at newcomers to the field, graduate students, researchers or scientists, attracted by the many applications of SERS and plasmonics or its basic science. The emphasis is on concepts and background material for SERS, such as Raman spectroscopy, the physics of plasmons, or colloid science, all of them introduced within the context of SERS, and from where the more specialized literature can be followed. - Represents one of very few books fully dedicated to the topic of surface-enhanced Raman spectroscopy (SERS) - Gives a comprehensive summary of the underlying physical concepts around SERS - Provides a detailed analysis of plasmons and plasmonics
