Download or read book Optical Studies of Colloidal Crystals written by Ioannis Monovoukas and published by . This book was released on 1990 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Quality Colloidal Crystals with Different Architectures and Their Optical Properties written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this present work high quality PMMA opals with different sphere sizes, silica opals from large size spheres, multilayer opals, and inverse opals were fabricated. Highly monodisperse PMMA spheres were synthesized by surfactant-free emulsion polymerization (polydispersity ~2%). Large-area and well-ordered PMMA crystalline films with a homogenous thickness were produced by the vertical deposition method using a drawing device. Optical experiments have confirmed the high quality of these PMMA photonic crystals, e.g., well resolved high-energy bands of the transmission and reflectance spectra of the opaline films were observed. For fabrication of high quality opaline photonic crystals from large silica spheres (diameter of 890 nm), self-assembled in patterned Si-substrates a novel technique has been developed, in which the crystallization was performed by using a drawing apparatus in combination with stirring. The achievements comprise a spatial selectivity of opal crystallization without special treatment of the wafer surface, the opal lattice was found to match the pattern precisely in width as well as depth, particularly an absence of cracks within the size of the trenches, and finally a good three-dimensional order of the opal lattice even in trenches with a complex confined geometry. Multilayer opals from opaline films with different sphere sizes or different materials were produced by sequential crystallization procedure. Studies of the transmission in triple-layer hetero-opal revealed that its optical properties cannot only be considered as the linear superposition of two independent photonic bandgaps. The remarkable interface effect is the narrowing of the transmission minima. Large-area, high-quality, and robust photonic opal replicas from silicate-based inorganic-organic hybrid polymers (ORMOCER® s) were prepared by using the template-directed method, in which a high quality PMMA opal template was infiltrated with a neat inorganic-organic ORMOCER® oligomer,
Download or read book Photonic Crystals written by Qihuang Gong and published by CRC Press. This book was released on 2014-02-06 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a broad overview of photonic crystals and, as the title suggests, covers their principles and applications. It is written from a physics point of view with an emphasis on materials science. Equations are well explained and often completely avoided to increase the readability of the book.The book is divided into eight chapters, st
Download or read book Photonic Crystals written by Kurt Busch and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of the contributions in this topically edited book stems from the priority program SPP 1113 "Photonische Kristalle" run by the Deutsche Forschungsgemeinschaft (DFG), resulting in a survey of the current state of photonic crystal research in Germany. The first part of the book describes methods for the theoretical analysis of their optical properties as well as the results. The main part is dedicated to the fabrication, characterization and modeling of two- and three-dimensional photonic crystals, while the final section presents a wide spectrum of applications: gas sensors, micro-lasers, and photonic crystal fibers. Illustrated in full color, this book is not only of interest to advanced students and researchers in physics, electrical engineering, and material science, but also to company R&D departments involved in photonic crystal-related technological developments.
Download or read book High Quality Colloidal Crystals with Different Architectures and Their Optical Properties written by Jianhui Ye and published by . This book was released on 2006 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanophotonic Materials written by Ralf B. Wehrspohn and published by John Wiley & Sons. This book was released on 2008-09-08 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: `Nanophotonic Materials - Photonic Crystals, Plasmonics, and Metamaterials' summarizes the work and results of a consortium consisting of more than 20 German research groups concentrated on photonics crystals research over the last seven years. Illustrated throughout in full color, the book provides an overview of these novel materials, spanning the entire range from fundamentals to applications.
Download or read book On Improving the Optical Quality of Colloidal Photonic Crystals microform written by Mathieu Allard and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work advances the understanding of the impact of lattice disorder on the optical properties of colloidal photonic crystals. It also demonstrates and quantifies improvements in the structural and optical quality of the crystals through refinements of the fabrication techniques. Arrays of colloidal particles were grown on substrates covered with holographic relief gratings realized in photoresist films. When the grating pitch was commensurate with the particle size, a uniform lattice orientation was imposed in the crystals. The enhancement in crystal order was visible for thicknesses as large as 40 layers. The impact of lattice disorder on the optical properties of colloidal photonic crystals was investigated numerically. The greatest impact on the optical properties came from size non-uniformity of colloidal particles. A novel algorithm, based on simulated annealing, was used to generate densely packed arrays of spheres with a given size distribution. When the size standard deviation was larger than 3%, a transition from ordered to random-packed arrangements was observed, along with large and sudden changes in optical properties, in the form of increased scattering and reduced contrast associated with the 111 stopband in transmittance spectra. The abruptness of this transition increased with decreasing index contrast. The numerical results agreed well with experimental results. The enhancement of long-range order was further demonstrated and quantified by optical techniques. The diffraction patterns produced when a collimated laser beam illuminated colloidal crystals were shown to be capable of revealing whether the crystals were mono- or poly-crystalline. Quantitative information about internal ordering was also extracted from diffraction spectra: the photon mean free path in the crystal was estimated to be in the range of 3 to 58 lattice constants, depending on the crystal growth conditions.
Download or read book Pattern Formations and Oscillatory Phenomena written by Junpei Yamanaka and published by Elsevier Inc. Chapters. This book was released on 2013-05-09 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submicron-sized colloidal particles dispersed in a liquid medium self-assemble to form ordered “crystal” structures in which the particles are regularly arranged in body-centered or face-centered cubic lattice structures. Colloidal crystals have been useful models for studying crystallization in general. They have also attracted considerable attention as novel materials. In this chapter, we describe the physical basis and experimental studies of colloidal crystallization, in particular those of charged colloids. We first present a general introduction to the physical background on the stability and interaction of colloids. Then we report our studies on the crystallization of charged colloids, including charge-induced crystallization, unidirectional crystallization, gel immobilization, and exclusion of impurities. Finally, we review recent research topics in this field, including those on opal crystals and complex structures.
Download or read book Theoretical Foundations and Application of Photonic Crystals written by Alexander Vakhrushev and published by BoD – Books on Demand. This book was released on 2018-04-04 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the description of research and design of photonic crystals. Topics included in the book cover a wide range of research in the field of theoretical analysis and experimental investigation: the electromagnetic field in the photonic crystal, propagation of waves in the gyrotropic magnetophotonic crystals, low one-photon absorption, ultratransparent photonic crystals, colloidal assembly, photonic crystal application for development of all-optical computational system, design strategies for PC devices, self-organization of liquid crystalline nanostructures, and optical diodes. This book will be useful for engineers, technologists, researchers, and postgraduate students interested in the research, design, fabrication processes, and applications of photonic crystals.
Download or read book New Nonlinear Optical Materials written by Ji-Ping Huang and published by Nova Publishers. This book was released on 2007 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical materials with large values of non-linear susceptibilities and fast responses are in great demand in industrial applications, such as non-linear optical switching devices for use in photonics and real-time coherent optical signal processors, optical limiters, and so on. In general, many applications of non-linear optics that have been demonstrated under controlled laboratory conditions could become practical for technological uses if such materials were available. It is usually believed that an effective enhanced non-linear optical response can appear in a composite material in which at least one component should possess an inherent non-linear optical response. Thus, the common way to develop new non-linear optical materials is to seek materials in which the components possess an inherently large non-linear optical response. In contrast, the author has theoretically exploited some new non-linear optical materials, e.g., colloidal nanocrystals with strong lattice effects, metallic films with inhomogeneous microstructures adjusted by ion doping or temperature gradient, composites of graded (and/or shape-anisotropic) nanoparticles, etc. The proposed materials are difficult or impossible to achieve with conventional, naturally occurring materials or random composites widely discussed in the literature. This book presents a first-hand review of the latest developments in this field.
Download or read book Measurement of Optical Photonic Band Structure in Colloidal Crystals written by Martin Zinkin and published by . This book was released on 1992 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Optical Photonic Band Structure in Fcc Colloidal Crystals written by İsmet İnanç Tarhan and published by . This book was released on 1996 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photonic Crystals and Light Localization in the 21st Century written by C.M. Soukoulis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented at the NATO Advanced Study Institute (ASI) Photonic Crystals and Light Localization held at the Creta Maris Hotel in Limin Hersonissou, Crete, June 18-30, 2000. Photonic crystals offer unique ways to tailor light and the propagation of electromagnetic waves (EM). In analogy to electrons in a crystal, EM waves propagating in a structure with a periodically modulated dielectric constant are organized into photonic bands, separated by gaps where propagating states are forbidden. There have been proposals for novel applications ofthese photonic band gap (PBG) crystals, with operating frequencies ranging from microwave to the optical regime, that include zero threshold lasers, low-loss resonators and cavities, and efficient microwave antennas. Spontaneous emission, suppressed for photons in the photonic band gap, offers novel approaches to manipulate the EM field and create high-efficiency light-emitting structures. Innovative ways to manipulate light can have a profound iofluence on science and technology.
Download or read book Optical Properties of Photonic Structures written by Mikhail F. Limonov and published by CRC Press. This book was released on 2012-06-25 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collection of articles in this book offers a penetrating shaft into the still burgeoning subject of light propagation and localization in photonic crystals and disordered media. While the subject has its origins in physics, it has broad significance and applicability in disciplines such as engineering, chemistry, mathematics, and medicine. Unlike other branches of physics, where the phenomena under consideration require extreme conditions of temperature, pressure, energy, or isolation from competing effects, the phenomena related to light localization survive under the most ordinary of conditions. This provides the science described in this book with broad applicability and vitality. However, the greatest challenge to the further development of this field is in the reliable and inexpensive synthesis of materials of the required composition, architecture and length scale, where the proper balance between order and disorder is realized. Similar challenges have been faced and overcome in fields such as semiconductor science and technology. The challenge of photonic crystal synthesis has inspired a variety of novel fabrication protocols such as self-assembly and optical interference lithography that offer much less expensive approaches than conventional semiconductor microlithography. Once these challenges are fully met, it is likely that light propagation and localization in photonic microstructures will be at the heart of a 21st-century revolution in science and technology. —From the Introduction, Sajeev John, University of Toronto, Ontario, Canada One of the first books specifically focused on disorder in photonic structures, Optical Properties of Photonic Structures: Interplay of Order and Disorder explores how both order and disorder provide the key to the different regimes of light transport and to the systematic localization and trapping of light. Collecting contributions from leaders of research activity in the field, the book covers many important directions, methods, and approaches. It describes various one-, two-, and three-dimensional structures, including opals, aperiodic Fibonacci-type photonic structures, photonic amorphous structures, photonic glasses, Lévy glasses, and hypersonic, magnetophotonic, and plasmonic–photonic crystals with nanocavities, quantum dots, and lasing action. The book also addresses practical applications in areas such as optical communications, optical computing, laser surgery, and energy.
Download or read book Optical Properties of 3d Ions in Crystals written by Nicolae M. Avram and published by Springer Science & Business Media. This book was released on 2013-05-13 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Optical Properties of 3d-Ions in Crystals: Spectroscopy and Crystal Field Analysis" discusses spectral, vibronic and magnetic properties of 3d-ions in a wide range of crystals, used as active media for solid state lasers and potential candidates for this role. Crystal field calculations (including first-principles calculations of energy levels and absorption spectra) and their comparison with experimental spectra, the Jahn-Teller effect, analysis of vibronic spectra, materials science applications are systematically presented. The book is intended for researchers and graduate students in crystal spectroscopy, materials science and optical applications. Dr. N.M. Avram is an Emeritus Professor at the Physics Department, West University of Timisoara, Romania; Dr. M.G. Brik is a Professor at the Institute of Physics, University of Tartu, Estonia.
Download or read book Nonlinear Optical Crystals A Complete Survey written by David N. Nikogosyan and published by Springer Science & Business Media. This book was released on 2006-03-21 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Optical Crystals contains the most complete and up-to-date reference material on properties of nonlinear optical crystals including: Traditional and specific applications The mathematical formulas necessary for the calculation of the frequency conversion process A survey of 63 nonlinear optical crystals containing more than 1500 different references with full titles Recent applications of common and novel nonlinear materials, including quasi-phase matching Special consideration for periodically-poled and self-frequency-doubling materials Significant amount of crystallophysical, thermophysical, spectroscopic, electro-optic and magneto-optic information
Download or read book Responsive Photonic Nanostructures written by Yadong Yin and published by Royal Society of Chemistry. This book was released on 2013 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonic crystal nanostructures, whose photonic properties can be tuned in response to external stimuli, are desired for a wide range of applications in colour displays, biological and chemical sensors, and inks and paints. Until now there is no single resource which gives a complete overview of these exciting smart materials. esponsive Photonic Nanostructures: Smart Nanoscale Optical Materials details the fabrication of photonic crystal structures through self-assembly approaches, general strategies and approaches for creating responsive photonic structures for different responsive systems such as chemical, optical, electrical and magnetic as well as their applications. With contributions from leading experts in the field, this comprehensive summary on responsive photonic nanostructures is suitable for postgraduates and researchers in academia and industry interested in smart materials and their potential applications.
