Download or read book Silicon Nanomembranes for Optical Phased Array OPA Applications written by Amir Hosseini and published by . This book was released on 2011 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theory, design, fabrication and characterization of on-chip optical beam steering systems are presented in this dissertation. Silicon photonics is being considered for integration with conventional CMOS technology for large-band width and low loss on and off-chip communications. We choose silicon nanomembrane, or silicon-on-insulator (SOI) substrates for implementation of large-angle and agile beam steeres. While working on the targeted device, we contributed to the theory, modeling, engineering and implementation of different building blocks. Multimode-interference couplers (MMIs) constitute important parts of this dissertation. These devices are commonly used as on-chip beam splitters, optical switches and on-chip static phase shifters. The MMIs' principles of operation are suited in more details and design rules are derived for the first time. MMI based beam splitters with number of outputs as large as 12 are fabricated and tested on SOI wafers. Traditionally, MMIs devices were designed by means of computationally expensive numerical simulations. Numerically and experimentally, we show that our analytical design rules make design of MMIs with low insertion loss and highly uniform outputs possible without additional optimization processes. Optical phased arrays include phase shifter blocks. In the first prototype, we use micro-heaters for tuning the optical phase. The bread-loafing effect, which is generally considered an undeniable phenomenon in the silicon industry, is engineered to realize a mechanical structure to efficiently direct heat toward the silicon waveguides. We also investigate slow light photonic crystal based delay lines to be used as phase shifters. An important drawback of such devices is the low coupling efficiency between slow-light photonic crystal waveguides and fast light strip waveguides. We numerically and experimentally investigate the coupling efficiency, and show for the first time that a few-period long fast-light photonic crystal waveguide without any group index tapering suffices for efficient coupling. The prototype is fabricated, packaged and tested and optical beam steering angle over ±30degrees is demonstrated. Finally, preliminary investigations for 3D implementation of the beam steerer system are presented to clarify the approaches to take for future works.
Download or read book Silicon Nanomembranes written by John A. Rogers and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microfluidics written by Yu Song and published by John Wiley & Sons. This book was released on 2018-05-07 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book offering a global overview of fundamental microfluidics and the wide range of possible applications, for example, in chemistry, biology, and biomedical science. As such, it summarizes recent progress in microfluidics, including its origin and development, the theoretical fundamentals, and fabrication techniques for microfluidic devices. The book also comprehensively covers the fluid mechanics, physics and chemistry as well as applications in such different fields as detection and synthesis of inorganic and organic materials. A useful reference for non-specialists and a basic guideline for research scientists and technicians already active in this field or intending to work in microfluidics.
Download or read book Metal Organic Frameworks for Biomedical Applications written by Masoud Mozafari and published by Woodhead Publishing. This book was released on 2020-03-17 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-Organic Frameworks for Biomedical Applications is a comprehensive, authoritative reference that offers a substantial and complete treatment of published results that have yet to be critically reviewed. It offers a summary of current research and provides in-depth understanding of the role of metal-organic frameworks in biomedical engineering. The title consists of twenty-two chapters presented by leading international researchers in the field. Chapters are arranged by target-application in biomedical engineering, allowing medical and pharmaceutic specialists to translate current materials and engineering science on metal-organic frameworks into their work. Presents the state-of-the art in metal-organic frameworks for biomedical applications Offers comprehensive treatment of metal-organic frameworks that is useful to pharmaceutic and medical experts who are non-specialists in materials science Helps materials scientists and engineers understand the needs of biomedical engineering Critically-reviews published results and current research in the field
Download or read book Electromagnetic Metamaterials written by Kazuaki Sakoda and published by Springer Nature. This book was released on 2019-09-09 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents novel and fundamental aspects of metamaterials, which have been overlooked in most previous publications, including chirality, non-reciprocity, and the Dirac-cone formation. It also describes the cutting-edge achievements of experimental studies in the last several years: the development of high-regularity metasurfaces in optical frequencies, high-performance components in the terahertz range, and active, chiral, nonlinear and non-reciprocal metamaterials in the microwave range. Presented here are unique features such as tunable metamaterials based on the discharge plasma, selective thermal emission from plasmonic metasurfaces, and the classical analogue of the electromagnetically induced transparency. These most advanced research achievements are explained in understandable terms by experts in each topic. The descriptions with many practical examples facilitate learning, and not only researchers and experts in this field but also graduate students can read the book without difficulty. The reader finds how these new concepts and new developments are being utilized for practical applications.
Download or read book Silicon Nanomembranes written by John A. Rogers and published by John Wiley & Sons. This book was released on 2016-08-08 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by the leaders in the fi eld, with chapters from highly renowned international researchers, this is the fi rst coherent overview of the latest in silicon nanomembrane research. As such, it focuses on the fundamental and applied aspects of silicon nanomembranes, ranging from synthesis and manipulation to manufacturing, device integration and system level applications, including uses in bio-integrated electronics, three-dimensional integrated photonics, solar cells, and transient electronics. The first part describes in detail the fundamental physics and materials science involved, as well as synthetic approaches and assembly and manufacturing strategies, while the second covers the wide range of device applications and system level demonstrators already achieved, with examples taken from electronics and photonics and from biomedicine and energy.
Download or read book Azobenzene Containing Materials written by Almeria Natansohn and published by Wiley-VCH. This book was released on 1999-06-24 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Azobenzene is an unusual "regular" molecule with fascinating possibilities and endless surprises. The mono- and multilayer behavior of azobenzene-containing materials, the photoinduced motion, and the possibility of massive material displacement well below the glass transition temperature open yet new avenues of research and applications. This book contains oral and poster presentations of the symposium "Azobenzene-Containing materials" held at Boston ACS Fall Meeting 1998. It will help people understand why is this subject so fascinating and it will attract even more researchers to the area.
Download or read book Emergent States in Photoinduced Charge Density Wave Transitions written by Alfred Zong and published by Springer Nature. This book was released on 2021-09-17 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book advances understanding of light-induced phase transitions and nonequilibrium orders that occur in a broken-symmetry system. Upon excitation with an intense laser pulse, materials can undergo a nonthermal transition through pathways different from those in equilibrium. The mechanism underlying these photoinduced phase transitions has long been researched, but many details in this ultrafast, non-adiabatic regime still remain to be clarified. The work in this book reveals new insights into this phenomena via investigation of photoinduced melting and recovery of charge density waves (CDWs). Using several time-resolved diffraction and spectroscopic techniques, the author shows that the light-induced melting of a CDW is characterized by dynamical slowing-down, while the restoration of the symmetry-breaking order features two distinct timescales: A fast recovery of the CDW amplitude is followed by a slower re-establishment of phase coherence, the latter of which is dictated by the presence of topological defects in the CDW. Furthermore, after the suppression of the original CDW by photoexcitation, a different, competing CDW transiently emerges, illustrating how a hidden order in equilibrium can be unleashed by a laser pulse. These insights into CDW systems may be carried over to other broken-symmetry states, such as superconductivity and magnetic ordering, bringing us one step closer towards manipulating phases of matter using a laser pulse.
Download or read book Nanoscale Thermoelectrics written by Xiaodong Wang and published by Springer Science & Business Media. This book was released on 2013-11-18 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the efficient utilization of energy resources and the minimization of environmental damage, thermoelectric materials can play an important role by converting waste heat into electricity directly. Nanostructured thermoelectric materials have received much attention recently due to the potential for enhanced properties associated with size effects and quantum confinement. Nanoscale Thermoelectrics describes the theory underlying these phenomena, as well as various thermoelectric materials and nanostructures such as carbon nanotubes, SiGe nanowires, and graphene nanoribbons. Chapters written by leading scientists throughout the world are intended to create a fundamental bridge between thermoelectrics and nanotechnology, and to stimulate readers' interest in developing new types of thermoelectric materials and devices for power generation and other applications. Nanoscale Thermoelectrics is both a comprehensive introduction to the field and a guide to further research, and can be recommended for Physics, Electrical Engineering, and Materials Science departments.
Download or read book Polarization Holography written by Ludmila Nikolova and published by Cambridge University Press. This book was released on 2009-05-14 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reference for researchers reviewing the developments in this field over the last 15 years.
Download or read book Nanotechnology written by Michael Köhler and published by John Wiley & Sons. This book was released on 2008-01-08 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expectations of a technological revolution are associated with nanotechnology, and indeed the generation, modification and utilization of objects with tiniest dimensions already permeates science and research in a way that the absence of nanotechnology is no longer conceivable. It has progressed to an independent interdisciplinary field, its great success due to the purposeful combination of physical, mechanical and molecular techniques. This book starts out with the most important fundamentals of microtechnology and chemistry on which the understanding of shaping nanoscale structures are based, then a variety of examples illustrate the fabrication of nanostructures from different materials. Subsequently, methods for characterization of the generated structures are presented to the reader. Through this fascinating introduction, both scientists and engineers gain insights into the "other side" of nanotechnology.
Download or read book Bulk Nanostructured Materials written by Ruslan Z. Valiev and published by John Wiley & Sons. This book was released on 2013-09-17 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most recent results in the area of bulk nanostructured materials and new trends in their severe plastic deformation (SPD) processing, where these techniques are now emerging from the domain of laboratory-scale research into the commercial production of various bulk nanomaterials. Special emphasis is placed on an analysis of the effect of nanostructures in materials fabricated by SPD on mechanical properties (strength and ductility, fatigue strength and life, superplasticity) and functional behavior (shape memory effects, magnetic and electric properties), as well as the numerous examples of their innovative applications. There is a high innovation potential for industrial applications of bulk nanomaterials for structural use (materials with extreme strength) as well as for functional applications such as nanomagnets, materials for hydrogen storage, thermoelectric materials, superconductors, catalysts, and biomedical implants.
Download or read book Quantum Measurement written by Vladimir B. Braginsky and published by Cambridge University Press. This book was released on 1995-05-25 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date introduction to the quantum theory of measurement. Although the main principles of the field were elaborated in the 1930s by Bohr, Schrödinger, Heisenberg, von Neuman, and Mandelstam, it was not until the 1980s that technology became sufficiently advanced to allow its application in real experiments. Quantum measurement is now central to many ultra-high technology developments, such as "squeezed light," single atom traps, and searches for gravitational radiation. It is also considered to have great promise for computer science and engineering, particularly for its applications in information processing and transfer. The book begins with a brief introduction to the relevant theory and goes on to discuss all aspects of the design of practical quantum measurement systems.
Download or read book Oncoimmunology written by Laurence Zitvogel and published by Springer. This book was released on 2017-12-13 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, leading experts in cancer immunotherapy join forces to provide a comprehensive guide that sets out the main principles of oncoimmunology and examines the latest advances and their implications for clinical practice, focusing in particular on drugs with FDA/EMA approvals and breakthrough status. The aim is to deliver a landmark educational tool that will serve as the definitive reference for MD and PhD students while also meeting the needs of established researchers and healthcare professionals. Immunotherapy-based approaches are now inducing long-lasting clinical responses across multiple histological types of neoplasia, in previously difficult-to-treat metastatic cancers. The future challenges for oncologists are to understand and exploit the cellular and molecular components of complex immune networks, to optimize combinatorial regimens, to avoid immune-related side effects, and to plan immunomonitoring studies for biomarker discovery. The editors hope that this book will guide future and established health professionals toward the effective application of cancer immunology and immunotherapy and contribute significantly to further progress in the field.
Download or read book Bacterial NanoCellulose written by Miguel Gama and published by CRC Press. This book was released on 2016-04-19 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book dedicated to the potential applications and unique properties of bacterial cellulose (BC), this seminal work covers the basic science, technology, and economic impact of this bulk chemical as well as the companies and patents that are driving the field. It reviews the biosynthesis and properties of BC, including genetics and characterization; discusses the advancing technology as it relates to product development, bioreactors, and production; and analyzes the economic impact of BC on a diverse range of industry applications, including materials and biomaterials, biological and polymer sciences, and electromechanical engineering.
Download or read book Collective Excitations in Solids written by Baldassare Di Bartolo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an ac count of the NATO Advanced Study Institute on "Collective Excitations in Solids," held in Erice, Italy, from June 15 to June 29, 1981. This meeting was organized by the International School of Atomic and Molecular Spectroscopy of the "Ettore Majorana" Centre for Scientific Culture. The objective of the Institute was to formulate a unified and coherent treatment of various collective excitation processes by drawing on the current advances in various branches of the physics of the solid state. A total of 74 participants came from 54 laboratories and 20 nations (Australia, Belgium, Burma, Canada, China, France, F. R. Germany, Greece, Israel, Italy, Mexico, The Netherlands, Pakistan, Poland, Portugal, Romania, Switzerland, Turkey, The Uni ted Kingdom, and The United States). The secretaries of the course were: Joseph Danko for the scientific aspects and Nino La Francesca for the administrative aspects of the meeting. Fourty-four lectures divided in eleven series were given. Nine "long" seminars and eight "short" seminars were also presented. In addition, two round-table discussions were held.
Download or read book Bionanocomposites written by Carole Aimé and published by John Wiley & Sons. This book was released on 2017-09-05 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with a general overview of nanocomposites, Bionanocomposites: Integrating Biological Processes for Bio-inspired Nanotechnologies details the systems available in nature (nucleic acids, proteins, carbohydrates, lipids) that can be integrated within suitable inorganic matrices for specific applications. Describing the relationship between architecture, hierarchy and function, this book aims at pointing out how bio-systems can be key components of nanocomposites. The text then reviews the design principles, structures, functions and applications of bionanocomposites. It also includes a section presenting related technical methods to help readers identify and understand the most widely used analytical tools such as mass spectrometry, calorimetry, and impedance spectroscopy, among others.
