Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
The Synthesis Characterization And Upconverting Properties Of Erbium Doped Ytterbium Erbium Co Doped Yttrium Oxysulfide Phosphors Under 808 980 And 1560 Nm Excitation
Download The Synthesis Characterization And Upconverting Properties Of Erbium Doped Ytterbium Erbium Co Doped Yttrium Oxysulfide Phosphors Under 808 980 And 1560 Nm Excitation full books in PDF, epub, and Kindle. Read online The Synthesis Characterization And Upconverting Properties Of Erbium Doped Ytterbium Erbium Co Doped Yttrium Oxysulfide Phosphors Under 808 980 And 1560 Nm Excitation ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis The Synthesis, Characterization, and Upconverting Properties of Erbium Doped ; Ytterbium, Erbium Co-doped Yttrium Oxysulfide Phosphors Under 808, 980, and 1560 Nm Excitation by : James Wilkins
Download or read book The Synthesis, Characterization, and Upconverting Properties of Erbium Doped ; Ytterbium, Erbium Co-doped Yttrium Oxysulfide Phosphors Under 808, 980, and 1560 Nm Excitation written by James Wilkins and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bulk yttrium oxysulfide phosphors were prepared using the polysulfide flux method. The morphology and structure was characterized using transmission electron microscopy and x-ray powdered diffraction. Visible emissions occurring near 530 and 550 nm and 660 - 670 nm consistent with the 2H11/2, 4S3/2 --> 4I15/2 and 4F9/2 --> 4I15/2 transitions, respectively, were observed under 808, 980, and 1560 nm excitation. The upconverting mechanisms excited at 808, 980, and 1560 nm have been investigated in detail. The power dependent behavior of the upconverted emission intensities for singly doped erbium phosphors excited at 808 and 980 nm indicated a two-photon excitation process. Likewise, the ytterbium and erbium co-doped phosphors excited at 980 nm also indicated a two-photon excitation process. Doping with 10% erbium showed the most intense emissions under 808 and 1560 nm excitation. Yttrium oxysulfide co-doped with 15% ytterbium and 3% erbium showed the most intense emissions under 980 nm excitation. Upon 1560 nm excitation, the intensity of the red emission band was significantly enhanced by co-doping erbium with ytterbium. Concentration quenching became apparent when either the concentration of erbium or ytterbium reached 20%.
Book Synopsis Synthesis of Erbium, Ytterbium-doped Hexagonal Phase Sodium Yttrium Fluoride Nanoparticles and Application to Ligand Exchange and Energy Transfer Studies by : Vishya Goel
Download or read book Synthesis of Erbium, Ytterbium-doped Hexagonal Phase Sodium Yttrium Fluoride Nanoparticles and Application to Ligand Exchange and Energy Transfer Studies written by Vishya Goel and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Structural and Spectroscopic Properties of Some New Erbium-based Materials by : Hassane Assaaoudi
Download or read book Synthesis, Structural and Spectroscopic Properties of Some New Erbium-based Materials written by Hassane Assaaoudi and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, particular attention has been devoted to developing "soft" chemistry approaches towards the synthesis of new lanthanide (rare-earth) materials under ambient conditions. This book presents a simple hydrothermal synthetic approach to produce a number of new erbium-based materials in the form of crystalline microflowers, hexagonal microlayers, microsticks and microspheres, which are comprised of nanoparticles, as well as nanofibers, nanorods and nanolayers. This book also discusses recent results concerning the synthesis, phases changes and vibrational spectra of rare-earth orthophosphates, together with similar data for the diphosphate, ErKP2O7.2H2O, and the tricyclophosphate, ErNa3(P3O9)2.9H2O.
Book Synopsis Optical and Luminescence Properties of Erbium, Ytterbium and Terbium Doped in Aluminum Nitride by : Tyler R. Corn
Download or read book Optical and Luminescence Properties of Erbium, Ytterbium and Terbium Doped in Aluminum Nitride written by Tyler R. Corn and published by . This book was released on 2010 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spectroscopic Analysis of Erbium-doped Silicon and Ytterbium-doped Indium Phosphide by : Ingrid Gersdorf
Download or read book Spectroscopic Analysis of Erbium-doped Silicon and Ytterbium-doped Indium Phosphide written by Ingrid Gersdorf and published by . This book was released on 2001 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical Study on Erbium Ytterbium Co-doped Super-fluorescent Fiber Source by :
Download or read book Theoretical Study on Erbium Ytterbium Co-doped Super-fluorescent Fiber Source written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Erbium ytterbium co-doped super-fluorescent fiber source (EYD-SFS) has been simulated by a theoretical model based on rate equations and power transfer equations. The output performances of four basic structures of EYD-SFS have been expressed, and it indicated that the DPF structure is a preferable structure. The dependence of output power, mean wavelength and bandwidth stability on the pump fiber length and the concentration of Er 3+ and Yb 3+ have also been studied. The results indicated with a proper doping concentration of Er 3+ and Yb 3+ of 6.0 × 10 26 ions/m 3 and 1.0 × 10 27 ions/m 3, the optimal gain fiber length is 3.6 cm. In this condition, good performances of DPF structure of EYD-SFS have been achieved.
Book Synopsis Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications by : Ru-Shi Liu
Download or read book Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications written by Ru-Shi Liu and published by Springer. This book was released on 2016-09-01 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces readers to fundamental information on phosphor and quantum dots. It comprehensively reviews the latest research advances in and applications of fluoride phosphors, oxide phosphors, nitridosilicate phosphors and various quantum dot materials. Phosphors and phosphor-based quantum dot materials have recently gained considerable scientific interest due to their wide range of applications in lighting, displays, medical and telecommunication technologies. This work will be of great interest to researchers and graduate students in materials sciences and chemistry who wish to learn more about the principles, synthesis and analysis of phosphors and quantum dot materials.
Book Synopsis Theoretical Analysis of Erbium Doped Structures on Gain and Characterization of Erbium Doped Particles by : Feng Qian
Download or read book Theoretical Analysis of Erbium Doped Structures on Gain and Characterization of Erbium Doped Particles written by Feng Qian and published by . This book was released on 2011 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of the dissertation is to present work describing theoretical studies of planar structures with erbium doped regions and characterization of erbium doped particles. Numerical models of erbium doped Al2O3 were formulated, taking into account the up-conversion from the metastable Er3+ levels and the cross-relaxation process as a mechanism of energy transfer between Er3+ ions. The influence of amplified spontaneous emission (ASE) is also fully considered in the numerical model. The first part of this research investigates the effects of design geometries and nonlinear losses on gain in silicon waveguides with multiple trenched erbium-doped Al2O3 regions. Distributing erbium ions over multi-trench areas improves the gain to nonlinear loss ratio. 0.38 dB/cm higher signal amplification was generated when comparing the multiple and single-trench configurations. In the second part of this work, a dielectric vertical emitter structure consisting of an erbium doped active material layer sandwiched between two metallic layers is studied. In this structure, metal layers are used to guide the plasmonic pump mode that has the role of exciting the active material and act as mirrors in the vertical direction to form a cavity resonating at 1532 nm. We employ the transverse resonance method to compute the modes in the structure, and we focus on even (with respect to the x polarized electric field) TM modes. We show that such structures can be promising candidates for dielectric based vertical emitters. In the last part of this dissertation, characterization of micron sized erbium doped particles is discussed. We demonstrate the feasibility of single-shot, single-detector high-resolution imaging and tracking by a time-space-wavelength mapping technique. We experimentally demonstrate single-shot imaging at 1 line/50 ns capture rate. A correlation method is implemented to obtain the transient movement of an individual particle. This system can be further optimized for real-time imaging, tracking of multiple micro-particles or arbitrary objects.
Book Synopsis Erbium-ytterbium-yttrium Compounds for Light Emission at 1.54[mu]m by : Michiel Vanhoutte
Download or read book Erbium-ytterbium-yttrium Compounds for Light Emission at 1.54[mu]m written by Michiel Vanhoutte and published by . This book was released on 2013 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon microphotonics has emerged as the leading technology to overcome the interconnect bottleneck that limits a further increase of computation power following Moore's law. Optical interconnects between different electronic microprocessors in an electronic-photonic integrated circuit (EPIC) can provide a fast, low-loss and high-bandwidth alternative to electrical interconnects, which suffer from issues such as resistive heating, RC delays and channel crosstalk at an increasing device density. A crucial device in such an electronic-photonic integrated circuit is a compact, high-gain and low power optical amplifier to compensate for signal attenuation due to propagation losses and to recover signal strength after subsequent 3dB splits during fanout of the optical signal to different microprocessors. Erbium ions (Er3+) are an excellent candidate to provide amplification around [lambda] = 1.54[mu]m for optical telecommunications. Erbium-doped fiber amplifiers (EDFAs) have already enabled long-haul optical data transmission through silica optical fibers, but scaling down a fiber amplifier to an on-chip erbium-doped waveguide amplifier (EDWA) brings along significant materials and device design challenges. In this thesis, erbium-ytterbium oxide (Er.Yb2.0 3) and erbium-ytterbium-yttrium silicate (ErxYbYY 2 ,ySi 2O7 ) compounds are investigated as novel materials systems for the development of EDWAs. The high erbium and ytterbium solubility (>1022 cm-3) and refractive index (1.71
Book Synopsis Fabrication and characterisation of ytterbium by : Guillaume Vienne
Download or read book Fabrication and characterisation of ytterbium written by Guillaume Vienne and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Upconversion-pumped Luminescence Efficiency of Rare-earth-doped Hosts Sensitized with Trivalent Ytterbium by :
Download or read book Upconversion-pumped Luminescence Efficiency of Rare-earth-doped Hosts Sensitized with Trivalent Ytterbium written by and published by . This book was released on 1997 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the upconversion luminescence efficiencies of phosphors that generate red, green, and blue light. The phosphors studied are single crystals and powders co-doped with Er{sup 3+} and Yb{sup 3+}, and with Tm{sup 3+} and Yb{sup 3+}. The Yb ions are pumped near 980 nm; transfers of two or three quanta to the co-doped rare earth ion generate visible luminescence. The main contribution embodied in this work is the quantitative measurement of this upconversion efficiency, based on the use of a calibrated integrating sphere, determination of the fraction of pump light absorbed, and careful control of the pump laser beam profile. The green phosphors are the most efficient, yielding efficiency values as high as 4 %, with the red and blue materials giving 1 - 2 %. Saturation was observed in all cases, suggesting that populations of upconversion steps of the ions are maximized at higher power. Quasi-CW modeling of the intensity- dependent upconversion efficiency was attempted; input data included level lifetimes, transition cross sections, and cross-relaxation rate coefficients. The saturation of the Yb, Er:fluoride media is explained as the pumping of Er{sup 3+} ions into a bottleneck (long-lived state)- the 4I132 metastable level, making them unavailable for further excitation transfer. 32 refs., 5 figs., 3 tabs.
Book Synopsis Optical Properties and Population Statistics of Erbium in Optically Pumped Erbium Doped Zinc Silicate Germanate (ZSG) Waveguide Amplifiers by :
Download or read book Optical Properties and Population Statistics of Erbium in Optically Pumped Erbium Doped Zinc Silicate Germanate (ZSG) Waveguide Amplifiers written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing need for compact, efficient rare-earth doped waveguide optical amplifiers for use in optical communications. Zn2Si0.5Ge0.5O4 (ZSG) is a promising new host material for Erbium(Er) due to the high concentration of Er which can be incorporated and the high optical activity of the incorporated Er. In this thesis, the absorption and emission cross-sections of Er in Er-doped ZSG are measured both through an analysis of the photo-luminescence spectra, and from direct absorption measurements. Peak cross sections are about 3 x 10-24 m2, comparable to measurements on other oxide-based glass amplifiers. The population statistics of the excited Er-level (4I13/2), along with the excited state lifetime, are determined through a novel rate-equations-based frequency domain method in which the spontaneous emission power at 1534 nm is measured as a function of pump power (980nm) and pump modulation frequency. The determined lifetime of 2ms is comparable to the 2.3ms measured using a conventional pump probe technique. The novel analysis technique yields the Er population statistics and lifetime under different pumping conditions independent of the unknown and variable coupling in and out of the waveguide. This method predicts zero net gain at 70mW, about what is observed. Comparison of calculated gain (based on Er density and measured cross-sections) with measured gains suggest that only about 20-30% of the Er in the material is optically active. Thus, by a systematic study of cross sections, Er population statistics and lifetime, and fraction of optically active Er as a function of Er density, the mechanisms for gain quenching with concentration can be studied. A 4.7cm long sample demonstrated a peak fiber-to-fiber net gain of 2̃ dB and a signal enhancement of>13 dB. Cavity characteristics were measured using an analysis of coherent reflection under no pumping. The facet reflectivity was determined to be 0.27 and the scattering/absorption loss was 1.05/cm. These losses, compared with an achievable gain of 0.25/cm under full inversion, suggest that optically pumped lasing at this concentration is not possible. Measurements techniques discussed in this thesis can be used to model and improve other rare-earth based amplifiers.
Book Synopsis Luminescence Thermometry by : Miroslav Dramićanin
Download or read book Luminescence Thermometry written by Miroslav Dramićanin and published by Woodhead Publishing. This book was released on 2018-04-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescence Thermometry: Methods, Materials, and Applications presents the state-of-the art applications of luminescence thermometry, giving a detailed explanation of luminescence spectroscopic schemes for the read-out of temperature, while also describing the diverse materials that are capable of sensing temperature via luminescence. Chapters cover the fundamentals of temperature, traditional thermometers and their figures of merit, a concise description of optical thermometry methods, luminescence and instrumentation, and an explanation of the ways in which increases in temperature quench luminescence. Additional sections focus on materials utilized for luminescence thermometry and the broad range of applications for luminescence thermometry, including temperature measurement at the nanoscale and the application of multifunctional luminescent materials. Provides an overview of luminescence thermometry applications, including high-temperature, biomedical, nanoscale and multifunctional Delves into luminescence thermometry by materials group, including Rare-earth and transition Metal Ion Doped, Semiconductors, Quantum Dots and Organic materials Gives a concise introduction of the latest methods of temperature measurement, including luminescence spectroscopic schemes and methods of analysis
Book Synopsis Nanostructured Metal Oxides and Devices by : M. K. Jayaraj
Download or read book Nanostructured Metal Oxides and Devices written by M. K. Jayaraj and published by Springer Nature. This book was released on 2020-04-16 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book primarily covers the fundamental science, synthesis, characterization, optoelectronic properties, and applications of metal oxide nanomaterials. It discusses the basic aspects of synthetic procedures and fabrication technologies, explains the related experimental techniques and also elaborates on the current status of nanostructured oxide materials and related devices. Two major aspects of metal oxide nanostructures – their optical and electrical properties – are described in detail. The first five chapters focus on the optical characteristics of semiconducting materials, especially metal oxides at the nanoscale. The following five chapters discuss the electrical properties observed in metal oxide-based semiconductors and the status quo of device-level developments in a variety of applications such as sensors, transistors, dilute magnetic semiconductors, and dielectric materials. The basic science and mechanism behind the optoelectronic phenomena are explained in detail, to aid readers interested in the structure–property symbiosis in semiconducting nanomaterials. In short, the book offers a valuable reference guide for researchers and academics in the areas of material science and semiconductor technology, especially nanophotonics and electronics.
Book Synopsis The Handbook of Photonics by : Mool C. Gupta
Download or read book The Handbook of Photonics written by Mool C. Gupta and published by CRC Press. This book was released on 2018-10-03 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting changes in the field in the ten years since the publication of the first edition, The Handbook of Photonics, Second Edition explores recent advances that have affected this technology. In this new, updated second edition editor Mool Gupta is joined by John Ballato, strengthening the handbook with their combined knowledge and the continued contributions of world-class researchers. New in the Second Edition: Information on optical fiber technology and the economic impact of photonics Coverage of emerging technologies in nanotechnology Sections on optical amplifiers, and polymeric optical materials The book covers photonics materials, devices, and systems, respectively. An introductory chapter, new to this edition, provides an overview of photonics technology, innovation, and economic development. Resting firmly on the foundation set by the first edition, this new edition continues to serve as a source for introductory material and a collection of published data for research and training in this field, making it the reference of first resort.
Book Synopsis Upconversion Nanophosphors by : Sabu Thomas
Download or read book Upconversion Nanophosphors written by Sabu Thomas and published by Elsevier. This book was released on 2021-11-04 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upconversion Nanophosphors provides detailed information about various lanthanide-based upconversion nanoparticles and their application in different fields. It will also help solve fundamental and applied problems of inorganic phosphor materials showing upconversion behavior, as well as generate innovative ideas related to the application of inorganic phosphor materials. This book will prove to be an invaluable reference work for scientists, engineers, industrial experts, and masters and PhD students working in the field of upconversion and materials science. Covers the synthesis and characterization of upconversion nanophosphors and their applications Highlights which classes of upconversion materials are suitable for a specific application Explores processes to engineer upconversion nanoparticles for state-of-the-art technologies, including upconversion labelling and counterfeiting, highly sensitive and selective biosensing, and upconversion-activated drug delivery
Book Synopsis Lanthanide Luminescence by : Pekka Hänninen
Download or read book Lanthanide Luminescence written by Pekka Hänninen and published by Springer Science & Business Media. This book was released on 2011-06-21 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanides have fascinated scientists for more than two centuries now, and since efficient separation techniques were established roughly 50 years ago, they have increasingly found their way into industrial exploitation and our everyday lives. Numerous applications are based on their unique luminescent properties, which are highlighted in this volume. It presents established knowledge about the photophysical basics, relevant lanthanide probes or materials, and describes instrumentation-related aspects including chemical and physical sensors. The uses of lanthanides in bioanalysis and medicine are outlined, such as assays for in vitro diagnostics and research. All chapters were compiled by renowned scientists with a broad audience in mind, providing both beginners in the field and advanced researchers with comprehensive information on on the given subject.
![Download Erbium-ytterbium-yttrium Compounds for Light Emission at 1.54[mu]m PDF Online Free](https://books.google.com/books/content/images/frontcover/ZAdWnwEACAAJ?fife=w200-h370)
