Download or read book Multi Color Quantum Well Infrared Photodetectors for Mid Long and Very Long Wavelength Infrared Applications written by Sheng S. Li and published by . This book was released on 2002 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum well infrared photodetectors (QWIPs) have been widely investigated for the 3 - 5 micrometers mid-wavelength infrared (MWIR) and 8 - 12 micrometers long-wavelength infrared (LWIR) atmospheric spectral windows as well as very long wavelength infrared (VLWIR: lambda(sub c)> 14 micrometers) detection in the past decade. The mature III-V compound semiconductor growth technology and the design flexibility of device structures have led to the rapid development of various QWIP structures for infrared focal plane arrays (FPAs) applications. In addition to the single-color QWIP with narrow bandwidth, the multi-color QWIP required for advanced IR sensing and imaging applications have also been emerged in recent years. Using band gap engineering approach, the multi-color (2, 3, and 4- color) QWIPs using multi-stack quantum wells with different well width and depth and voltage-tunable triple-coupled quantum well (TCQW) structure for detection in the MWIR, LWIR, and VLWIR bands have been demonstrated. In this paper, the design, fabrication, and characterization of a voltage-tunable 2-stack 3-color QWIP for MW/LW/LW IR detection and a 3-stack 3-color QWIP for detection in the water, ozone, and CO2 atmospheric blocking bands are depicted.
Download or read book Investigation of High Performance Multicolor Quantum Well Infrared Photodetectors and 4 X 4 Three color Focal Plane Array for Mid and Long wavelength Applications written by Jung Hee Lee and published by . This book was released on 2000 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Intersubband Infrared Photodetectors written by V. Ryzhii and published by World Scientific. This book was released on 2003 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared technologies are very important for a wide range of military, scientific and commercial applications. Devices and systems based on semiconductor heterostructure and quantum well and quantum dot structures open up a new era in infrared technologies.This book deals with various topics related to the latest achievements in the development of intersubband infrared photodetectors, reviewed by top experts in the field. It covers physical aspects of the operation of the devices as well as details of their design in different applications. The papers included in the book will be useful for researchers and engineers interested in the physics of optoelectronic devices as well as their practical design and applications.
Download or read book Characterization and Analysis of a Multicolor Quantum Well Infrared Photodetector written by and published by . This book was released on 2006 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents analysis and characterization of performance of a newly designed, multicolor quantum well infrared photodetector (QWIP). Specifically, it focuses on a detector capable of detecting infrared emissions in the near infrared (NIR), mid-wavelength infrared (MWIR), and long-wavelength infrared (LWIR). Through photocurrent spectroscopy and performance analysis, this prototype detector can be classified and prepared for possible future use within the U.S. Armed Forces. Certain military applications require a highly accurate, reliable, sensitive, and multispectral infrared detector to identify targets and ensure mission success. By designing and fabricating a multicolor quantum well infrared photodetector, simultaneous detection of targets in the near infrared, mid-wavelength infrared and long-wavelength infrared is possible using only one detector. In addition, power and cooling requirements for quantum well infrared detectors makes them suitable for use in the field.
Download or read book Quantum Well Infrared Photodetectors written by Harald Schneider and published by Springer. This book was released on 2006-10-18 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressed to both students as a learning text and scientists/engineers as a reference, this book discusses the physics and applications of quantum-well infrared photodetectors (QWIPs). It is assumed that the reader has a basic background in quantum mechanics, solid-state physics, and semiconductor devices. To make this book as widely accessible as possible, the treatment and presentation of the materials is simple and straightforward. The topics for the book were chosen by the following criteria: they must be well-established and understood; and they should have been, or potentially will be, used in practical applications. The monograph discusses most aspects relevant for the field but omits, at the same time, detailed discussions of specialized topics such as the valence-band quantum wells.
Download or read book Investigation of Multicolor and Simplified Quantum Well Infrared Photodetectors for MWIR and LWIR Detection written by and published by . This book was released on 2000 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research program, we have investigated a four-stack, four-color quantum well infrared photodetector (QWIP), and studied the voltage distribution and temperature effect in this four-color QWIP. We have conducted a study on the quantum confined Stark-effect in an n-type QWIP. We have performed theoretical studies of the intersubband optical transitions in quantum dots and the design of GaAs/InGaAs and InAs/InAlAs quantum dot infrared photodetectors (QDIPs) for MWIR and LWIR detection. A new QWIP for very long wavelength infrared (VLWIR) applications has been investigated for 14-16 (micrometer) detection. Specific issues concerning device physics, detector design and device performance of the VLWIR QWIP are addressed. A VLWIR QWIP has been designed, fabricated and characterized. Two high performance multi-color, broadband QWIPs using digital graded superlattice barriers (DGSLB) for long wavelength infrared (LWIR) and broadband (BB) infrared detection have been demonstrated. We have also developed a high performance broadband (BB) In(0.26) Ga(0.74) As/Al(x) Ga(1-x)As QWIP using a linearly graded (LGB) Al(x) Ga(1-x) As barrier for LWIR detection. Theoretical study on the enhancement of quantum efficiency in a QWIP by using photonic crystal structure has also been carried out in this report.
Download or read book GUIA do produtor written by and published by . This book was released on 1996 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Administração direta; Secretaria de política grícola-SPA; Abastecimento agropecuário; Secretaria de desenvolvimento rural-SDR; Assistência técnica e extensão rural; Conservação de solo e água; Cooperativismo e associativismo rural; Informação agrícola; Infra-estrutura rural; Mecanização e aviação agrícolas; Produção animal; Produção vegetal; Secretaria de defesa agropecuária-SDA; Defesa animal; Inspeção de produtos de origem animal; Defesa e inspeção vegetal; Endereços (EMATER, DEA, Convênios de classificação vegetal, Criadores de bovinos e laboratórios); Comissão especial de recursos-CER; Comissão executiva do plano da lavoura cacaueira-CEPLAC; Instituto naional de meteorologia-INMET; Administração indireta; Instituto nacional de colonização e reforma agrária-INCRA; Companhia Nacional de Abastecimento-CONAB; Empresa brasileira de pesquisa agropecuária -EMBRAPA; Companhia de colonização do nordeste-COLONE.
Download or read book Intersubband Infrared Photodetectors written by Victor Ryzhii and published by World Scientific. This book was released on 2003-06-25 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared technologies are very important for a wide range of military, scientific and commercial applications. Devices and systems based on semiconductor heterostructure and quantum well and quantum dot structures open up a new era in infrared technologies.This book deals with various topics related to the latest achievements in the development of intersubband infrared photodetectors, reviewed by top experts in the field. It covers physical aspects of the operation of the devices as well as details of their design in different applications. The papers included in the book will be useful for researchers and engineers interested in the physics of optoelectronic devices as well as their practical design and applications.
Download or read book Development of Multicolor Quantum Well Infrared Photodetector for Mid and Long wavelength Detection written by Jung-Chi Chiang and published by . This book was released on 1997 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Fifth International Symposium on Long Wavelength Infrared Detectors and Arrays Physics and Applications written by Sheng S. Li and published by The Electrochemical Society. This book was released on 1997 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Sixth International Symposium on Long Wavelength Infrared Detectors and Arrays Physics and Applications written by Sheng S. Li and published by The Electrochemical Society. This book was released on 1999 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Luminescent Materials and Quantum Confinement written by M. Cahay and published by The Electrochemical Society. This book was released on 1999 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physics of Quantum Well Infrared Photodetectors written by K. K. Choi and published by World Scientific. This book was released on 1997 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past, infrared imaging has been used exclusively for military applications. In fact, it can also be useful in a wide range of scientific and commercial applications. However, its wide spread use was impeded by the scarcity of the imaging systems and its high cost. Recently, there is an emerging infrared technology based on quantum well intersubband transition in III-V compound semiconductors. With the new technology, these impedances can be eliminated and a new era of infrared imaging is in sight. This book is designed to give a systematic description on the underlying physics of the new detectors and other issues related to infrared managing.
Download or read book Very Long Wavelength Quantum Well Infrared Photodetector written by and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared detector is a very important part of infrared sensor technology. In ballistic missile defense, infrared sensors play an important role in missile seeking, tracking, guiding, discriminating, and intercepting. Tactical applications for endo-atmospheric situation are mostly under a high background (300K), where a high operating temperature above liquid nitrogen (77K) is desired. IR materials such as HgCdTe, InSb, PtSi and quantum well infrared photodetectors (QWIP) are all suitable detector material systems for tactical applications, in which some material systems are more mature than others. For strategic applications, such as exo-atmospheric interceptors and space-based surveillance sensors, the target is usually far away with a cooler temperature, under a cold background. The detection wavelength of the detector under this situation needs to be at very-long-wavelength region (> 12 micrometers) for efficient detection of the cool target. The current state of the art HgCdTe (MCT) based IR detectors have not met all these requirements, and QWIPs provide a useful alternative for VLWIR applications. In this presentation, an overview of VLWIR QWIPs is given and three detailed detector structures and performance are discussed.
Download or read book Infrared and Terahertz Detectors Third Edition written by Antoni Rogalski and published by CRC Press. This book was released on 2019-01-10 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of Infrared and Terahertz Detectors provides a comprehensive overview of infrared and terahertz detector technology, from fundamental science to materials and fabrication techniques. It contains a complete overhaul of the contents including several new chapters and a new section on terahertz detectors and systems. It includes a new tutorial introduction to technical aspects that are fundamental for basic understanding. The other dedicated sections focus on thermal detectors, photon detectors, and focal plane arrays.
Download or read book Proceedings of the Third International Symposium on Long Wavelength Infrared Detectors and Arrays Physics and Applications III written by Sheng S. Li and published by The Electrochemical Society. This book was released on 1995 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the First International Symposium on Long Wavelength Infrared Detectors and Arrays Physics and Applications written by Farhad Radpour and published by . This book was released on 1995 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
