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Author : Fabian Purkl
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (118 download)
Download or read book Uncooled Infrared Detectors Based on Nanometer-thin Metal Films written by Fabian Purkl and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohammad Jafar Modarres-Zadeh
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (969 download)
Download or read book Uncooled Infrared Detector Featuring Silicon Based Nanoscale Thermocouple written by Mohammad Jafar Modarres-Zadeh and published by . This book was released on 2016 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main focus of this dissertation is to improve the performance of thermoelectric (TE) infrared (IR) detectors. TE IR detectors are part of uncooled detectors that can operate at room temperature. These detectors have been around for many years, however, their performance has been lower than their contesting technologies. A novel high-responsivity uncooled thermoelectric infrared detector is designed, fabricated, and characterized. This detector features a single stand-alone polysilicon-based thermocouple (without a supporting membrane) covered by an umbrella-like optical-cavity IR absorber. It is proved that the highest responsivity in the developed detectors can be achieved with only one thermocouple. Since the sub-micrometer polysilicon TE wires are the only heat path from the hot junction to the substrate, a superior thermal isolation is achieved. A responsivity of 1800 V/W and a detectivity of 2∗108 (cm.Hz[superscript 1/2]W[superscript −1]) are measured from a 20[micrometer] x 20[micrometer] detector comparable to the performance of detectors used in commercial focal planar arrays. This performance in a compact and manufacturable design elevates the position of thermoelectric IR sensors as a candidate for low-power, high performance, and inexpensive focal planar arrays. The improvement in performance is mostly due to low thermal conductivity of thin polysilicon wires. A feature is designed and fabricated to characterize the thermal conductivity of such a wire and it is shown for the first time that the thermal conductivity of thin polysilicon films can be much lower than that of the bulk. Thermal conductivity of ~110nm LPCVD polysilicon deposited at 620C is measured to be ~3.5W/m.K.
Author : Garret Moddel
Publisher : Springer Science & Business Media
ISBN 13 : 1461437164
Total Pages : 396 pages
Book Rating : 4.4/5 (614 download)
Download or read book Rectenna Solar Cells written by Garret Moddel and published by Springer Science & Business Media. This book was released on 2013-09-16 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rectenna Solar Cells discusses antenna-coupled diode solar cells, an emerging technology that has the potential to provide ultra-high efficiency, low-cost solar energy conversion. This book will provide an overview of solar rectennas, and provide thorough descriptions of the two main components: the diode, and the optical antenna. The editors discuss the science, design, modeling, and manufacturing of the antennas coupled with the diodes. The book will provide concepts to understanding the challenges, fabrication technologies, and materials required to develop rectenna structures. Written by experts in their specialized fields.
Author : Ahmad I. Nusir
Publisher :
ISBN 13 :
Total Pages : 234 pages
Book Rating : 4.:/5 (18 download)
Download or read book Design, Fabrication, and Characterization of Novel Optoelectronic Devices for Near-infrared Detection written by Ahmad I. Nusir and published by . This book was released on 2018 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigating semiconductor materials and devices at the nanoscale has become crucial in order to maintain the exponential development in today's technology. There is a critical need for making devices lower in power consumption and smaller in size. Nanoscale semiconductor materials provide a powerful platform for optoelectronic device engineers. They own interesting properties which include enhanced photoconductivity and size-tunable interband transitions. In this research, different types of nanostructures were investigated for optoelectronic devices: nanocrystals, nanowires, and thin-films. First, lead selenide nanocrystals with narrow bandgap were synthesized, size-tailored, and functionalized with molecular ligands for the application of uncooled near-infrared photodetectors. The devices showed strong room-temperature responsivity that is covering the entire near-infrared spectral region. In the second investigation self-powered devices based on asymmetric Schottky contacts were designed and fabricated to efficiently detect near-infrared radiations without external biasing. The dimensions and the type of the metal contacts were optimized in order to improve on the device performance. Then silicon nanowires were integrated with the asymmetric contacts to further enhance the performance of the self-powered detectors by increasing the light absorption. Third, an array of gold thin-films was designed to enhance the photocurrent in the near-infrared through the internal photoemission of hot electrons. The photocurrent enhancement was studied as function of thickness and type of the metal thin-film. Overall, those investigations provided important design considerations for future optoelectronic devices based on nanostructures. Moreover, the implementation of nanostructures with the devices showed superior performance as compared to the bulk.
Author : Chagaan Baatar
Publisher : Springer Science & Business Media
ISBN 13 : 1441910115
Total Pages : 252 pages
Book Rating : 4.4/5 (419 download)
Download or read book Cellular Nanoscale Sensory Wave Computing written by Chagaan Baatar and published by Springer Science & Business Media. This book was released on 2010-03-14 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is loosely based on a Multidisciplinary University Research Initiative (MURI) project and a few supplemental projects sponsored by the Of?ce of Naval Research (ONR) during the time frame of 2004–2009. The initial technical scope and vision of the MURI project was formulated by Drs. Larry Cooper and Joel Davis, both program of?cers at ONR at the time. The unifying theme of this MURI project and its companionefforts is the concept of cellular nonlinear/neuralnetwork (CNN) technology and its various extensions and chip implementations, including nanoscale sensors and the broadening ?eld of cellular wave computing. In recent years, CNN-based vision system drew much attention from vision scientists to device technologists and computer architects. Due to its early - plementation in a two-dimensional (2D) topography, it found success in early vision technologyapplications, such as focal-plane arrays, locally adaptable sensor/ processor integration, resulting in extremely high frame rates of 10,000 frames per second. More recently it drew increasing attention from computer architects, due to its intrinsic local interconnect architecture and parallel processing paradigm. As a result, a few spin-off companies have already been successful in bringing cel- lar wave computing and CNN technology to the market. This book aims to capture some of the recent advances in the ?eld of CNN research and a few select areas of applications.
Author : Lianhe Li
Publisher : Frontiers Media SA
ISBN 13 : 2889760200
Total Pages : 120 pages
Book Rating : 4.8/5 (897 download)
Download or read book Advances in Terahertz Detection and Imaging written by Lianhe Li and published by Frontiers Media SA. This book was released on 2022-04-28 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zoran Jakšić
Publisher : Springer
ISBN 13 : 3319096745
Total Pages : 274 pages
Book Rating : 4.3/5 (19 download)
Download or read book Micro and Nanophotonics for Semiconductor Infrared Detectors written by Zoran Jakšić and published by Springer. This book was released on 2014-09-25 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of microelectromechanic system (MEMS) technologies and nanotechnologies has resulted in a multitude of structures and devices with ultra compact dimensions and with vastly enhanced or even completely novel properties. In the field of photonics it resulted in the appearance of new paradigms, including photonic crystals that exhibit photonic bandgap and represent an optical analog of semiconductors and metamaterials that have subwavelength features and may have almost arbitrary values of effective refractive index, including those below zero. In addition to that, a whole new field of plasmonics appeared, dedicated to the manipulation with evanescent, surface-bound electromagnetic waves and offering an opportunity to merge nanoelectronics with all-optical circuitry. In the field of infrared technologies MEMS and nanotechnologies ensured the appearance of a new generation of silicon-based thermal detectors with properties vastly surpassing the conventional thermal devices. However, another family of infrared detectors, photonic devices based on narrow-bandgap semiconductors, has traditionally been superior to thermal detectors. Literature about their micro and nanophotonic enhancement has been scarce and scattered through journals. This book offers the first systematic approach to numerous different MEMS and nanotechnology-based methods available for the improvement of photonic infrared detectors and points out to a path towards uncooled operation with the performance of cryogenically cooled devices. It is shown that a vast area for enhancement does exists and that photonic devices can readily keep their leading position in infrared detection. The various methods and approaches described in the book are also directly applicable to different other types of photodetectors like solar cells, often with little or no modification.
Author : Lawrence Frederick Schloss
Publisher :
ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.:/5 (34 download)
Download or read book Development of a Novel Thin Film Pyroelectric Infrared Detector written by Lawrence Frederick Schloss and published by . This book was released on 2001 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Silicon Nitride, Silicon Dioxide Thin Insulating Films, and Other Emerging Diele[c]trics VIII PDF Online Free](https://books.google.com/books/content/images/frontcover/wUnw2OLLYf4C?fife=w200-h370)
Author : Ram Ekwal Sah
Publisher : The Electrochemical Society
ISBN 13 : 9781566774598
Total Pages : 606 pages
Book Rating : 4.7/5 (745 download)
Download or read book Silicon Nitride, Silicon Dioxide Thin Insulating Films, and Other Emerging Diele[c]trics VIII written by Ram Ekwal Sah and published by The Electrochemical Society. This book was released on 2005 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Markus Kohli
Publisher :
ISBN 13 :
Total Pages : 163 pages
Book Rating : 4.:/5 (81 download)
Download or read book Investigation of Pyroelectric Thin Films and Their Application in Micromachined Infrared Detectors written by Markus Kohli and published by . This book was released on 1998 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ingrid Wilke
Publisher :
ISBN 13 :
Total Pages : 99 pages
Book Rating : 4.:/5 (636 download)
Download or read book Antenna-coupled Nanometer Thin-film Ni-NiO Diodes for the Detection of 30 THz Infrared Radiation written by Ingrid Wilke and published by . This book was released on 1993 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ingrid Wilke
Publisher :
ISBN 13 :
Total Pages : 99 pages
Book Rating : 4.:/5 (692 download)
Download or read book Antenna-coupled Nanometer Thin-film Ni-NiO-Ni Diodes for the Detection of 30 THz Infrared Radiation written by Ingrid Wilke and published by . This book was released on 1993 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Helmut Budzier
Publisher : John Wiley & Sons
ISBN 13 : 0470976756
Total Pages : 280 pages
Book Rating : 4.4/5 (79 download)
Download or read book Thermal Infrared Sensors written by Helmut Budzier and published by John Wiley & Sons. This book was released on 2011-03-29 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problems involved in designing optimal infrared (IR) measuring systems under given conditions are commensurately complex. The optical set-up and radiation conditions, the interaction between sensor and irradiation and the sensor itself, determine the operation of the sensor system. Simple calculations for solving these problems without any understanding of the causal relationships are not possible. Thermal Infrared Sensors offers a concise explanation of the basic physical and photometric fundamentals needed for the consideration of these interactions. It depicts the basics of thermal IR sensor systems and explains the manifold causal relationships between the most important effects and influences, describing the relationships between sensor parameters such as thermal and special resolution, and application conditions. This book covers: various types of thermal sensors, like thermoelectric sensor, pyroelectric sensors, microbolometers, micro-Golay cells and bimorphous sensors; basic applications for thermal sensors; noise - a limiting factor for thermal resolution and detectivity - including an outline of the mathematics and noise sources in thermal infrared sensors; the properties of IR sensor systems in conjunction with the measurement environment and application conditions; 60 examples showing calculations of real problems with real numbers, as they occur in many practical applications. This is an essential reference for practicing design and optical engineers and users of infrared sensors and infrared cameras. With this book they will be able to transform the demonstrated solutions to their own problems, find ways to match their commercial IR sensors and cameras to their measurement conditions, and to tailor and optimise sensors and set-ups to particular IR measurement problems. The basic knowledge outlined in this book will give advanced undergraduate and graduate students a thorough grounding in this technology.
Author : Daniel Montero Álvarez
Publisher :
ISBN 13 : 9783030638276
Total Pages : 0 pages
Book Rating : 4.6/5 (382 download)
Download or read book Near Infrared Detectors Based on Silicon Supersaturated with Transition Metals written by Daniel Montero Álvarez and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis makes a significant contribution to the development of cheaper Si-based Infrared detectors, operating at room temperature. In particular, the work is focused in the integration of the Ti supersaturated Si material into a CMOS Image Sensor route, the technology of choice for imaging nowadays due to its low-cost and high resolution. First, the material is fabricated using ion implantation of Ti atoms at high concentrations. Afterwards, the crystallinity is recovered by means of a pulsed laser process. The material is used to fabricate planar photodiodes, which are later characterized using current-voltage and quantum efficiency measurements. The prototypes showed improved sub-bandgap responsivity up to 0.45 eV at room temperature. The work is further supported by a collaboration with STMicroelectronics, where the supersaturated material was integrated into CMOS-based sensors at industry level. The results show that Ti supersaturated Si is compatible in terms of contamination, process integration and uniformity. The devices showed similar performance to non-implanted devices in the visible region. This fact leaves the door open for further integration of supersaturated materials into CMOS Image Sensors.
Author : Nava Setter
Publisher : Springer Science & Business Media
ISBN 13 : 0387233199
Total Pages : 416 pages
Book Rating : 4.3/5 (872 download)
Download or read book Electroceramic-Based MEMS written by Nava Setter and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is focused on the use of functional oxide and nitride films to enlarge the application range of MEMS (microelectromechanical systems), including micro-sensors, micro-actuators, transducers, and electronic components for microwaves and optical communications systems. Applications, emerging applications, fabrication technology and functioning issues are presented and discussed. The book covers the following topics: Part A: Applications and devices with electroceramic-based MEMS: Chemical microsensors Microactuators based on thin films Micromachined ultrasonic transducers Thick-film piezoelectric and magnetostrictive devices Pyroelectric microsystems RF bulk acoustic wave resonators and filters High frequency tunable devices MEMS for optical functionality Part B: Materials, fabrication technology, and functionality: Ceramic thick films for MEMS Piezoelectric thin films for MEMS Materials and technology in thin films for tunable high frequency devices Permittivity, tunability and loss in ferroelectrics for reconfigurable high frequency electronics Microfabrication of piezoelectric MEMS Nano patterning methods for electroceramics Soft lithography emerging techniques The book is addressed to engineers, scientists and researchers of various disciplines, device engineers, materials engineers, chemists, physicists and microtechnologists who are working and/or interested in this fast growing and highly promising field. The publication of this book follows a Special Issue on electroceramic-based MEMS that was published in the Journal of Electroceramics at the beginning of 2004. The ten invited papers of that special issue were adapted by the authors into chapters of the present book and five additional chapters were added.
Author : Ashim Kumar Bain
Publisher : John Wiley & Sons
ISBN 13 : 3527805338
Total Pages : 358 pages
Book Rating : 4.5/5 (278 download)
Download or read book Ferroelectrics written by Ashim Kumar Bain and published by John Wiley & Sons. This book was released on 2017-01-27 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining both fundamental principles and real-life applications in a single volume, this book discusses the latest research results in ferroelectrics, including many new ferroelectric materials for the latest technologies, such as capacitors, transducers and memories. The first two chapters introduce dielectrics and microscopic materials properties, while the following chapter discusses pyroelectricity and piezoelectricity. The larger part of the text is devoted to ferroelectricity and ferroelectric ceramics, with not only their fundamentals but also applications discussed. The book concludes with a look at the future for laser printed materials and applications. With over 600 references to recent publications on piezoelectric and ferroelectric materials, this is an invaluable reference for physicists, materials scientists and engineers.
Author :
Publisher :
ISBN 13 :
Total Pages : 2540 pages
Book Rating : 4.3/5 (91 download)
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
