Quantum Cascade Lasers Qcls
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| Author | : Joseph D. Bennett |
| Publisher | : Nova Science Publishers |
| Total Pages | : 0 |
| Release | : 2016 |
| Genre | : Heterostructures |
| ISBN | : 9781536103878 |
Quantum cascade lasers (QCLs) are unipolar devices with lasing occurring through transitions between quantised energy levels within the conduction band. When compared to conventional lasers (e.g. gas, liquid or solid state lasers), these new optoelectronic devices present a fundamental advantage that resides in their ability to tailor the wavelength of the emitted light via the layer thickness rather than the band gap. This book discusses different types and applications of quantum cascade lasers.
| Author | : Jérôme Faist |
| Publisher | : Oxford University Press |
| Total Pages | : 321 |
| Release | : 2013-03-14 |
| Genre | : Science |
| ISBN | : 0198528248 |
This book describes the physics, fabrication technology, and applications of the quantum cascade laser.
| Author | : M Razeghi |
| Publisher | : Elsevier |
| Total Pages | : 602 |
| Release | : 2004 |
| Genre | : Science |
| ISBN | : 9780080444260 |
Tremendous progress has been made in the last few years in the growth, doping and processing technologies of the wide bandgap semiconductors. As a result, this class of materials now holds significant promis for semiconductor electronics in a broad range of applications. The principal driver for the current revival of interest in III-V Nitrides is their potential use in high power, high temperature, high frequency and optical devices resistant to radiation damage. This book provides a wide number of optoelectronic applications of III-V nitrides and covers the entire process from growth to devices and applications making it essential reading for those working in the semiconductors or microelectronics. Broad review of optoelectronic applications of III-V nitrides
| Author | : Edward Brame |
| Publisher | : CRC Press |
| Total Pages | : 384 |
| Release | : 1977-05-01 |
| Genre | : Science |
| ISBN | : 9780824765262 |
| Author | : Weidong Chen |
| Publisher | : Elsevier |
| Total Pages | : 634 |
| Release | : 2021-06-09 |
| Genre | : Science |
| ISBN | : 0128156899 |
Advances in Spectroscopic Monitoring of the Atmosphere provides a comprehensive overview of cutting-edge technologies and monitoring applications. Concepts are illustrated by numerous examples with information on spectroscopic techniques and applications widely distributed throughout the text. This information is important for researchers to gain an overview of recent developments in the field and make informed selections among the most suitable techniques. This volume also provides information that will allow researchers to explore implementing and developing new diagnostic tools or new approaches for trace gas and aerosol sensing themselves. Advances in Spectroscopic Monitoring of the Atmosphere covers advanced and newly emerging spectroscopic techniques for optical metrology of gases and particles in the atmosphere. This book will be a valuable reference for atmospheric scientists, including those whose focus is applying the methods to atmospheric studies, and those who develop instrumentation. It will also serve as a useful introduction to researchers entering the field and provide relevant examples to researchers and students developing and applying optical sensors for a variety of other scientific, technical, and industrial uses. - Overview of new applications including remote sensing by UAV, laser heterodyne radiometry, dual comb spectroscopy, and more - Features in-situ observations and measurements for real-world data - Includes content on leading edge optical sensors
| Author | : Dheeraj Kumar Singh |
| Publisher | : Springer Nature |
| Total Pages | : 663 |
| Release | : 2021-04-01 |
| Genre | : Technology & Engineering |
| ISBN | : 9813360844 |
The book highlights recent developments in the field of spectroscopy by providing the readers with an updated and high-level of overview. The focus of this book is on the introduction to concepts of modern spectroscopic techniques, recent technological innovations in this field, and current examples of applications to molecules and materials relevant for academia and industry. The book will be beneficial to researchers from various branches of science and technology, and is intended to point them to modern techniques, which might be useful for their specific problems. Spectroscopic techniques, that are discussed include, UV-Visible absorption spectroscopy, XPS, Raman spectroscopy, SERS, TERS, CARS, IR absorption spectroscopy, SFG, LIBS, Quantum cascade laser (QCL) spectroscopy, fluorescence spectroscopy, ellipsometry, cavity-enhanced absorption spectroscopy, such as cavity ring-down spectroscopy (CRDS) and evanescent wave-CRDS both in gas and condensed phases, time-resolved spectroscopy etc. Applications introduced in the different chapters demonstrates the usefulness of the spectroscopic techniques for the characterization of fundamental properties of molecules, e.g. in connection with environmental impact, bio-activity, or usefulness for pharmaceutical drugs, and materials important e.g. for nano-science, nuclear chemistry, or bio-applications. The book presents how spectroscopic techniques can help to better understand substances, which have also great impact on questions of social and economic relevance (environment, alternative energy, etc.).
| Author | : Louise Jumpertz |
| Publisher | : Springer |
| Total Pages | : 152 |
| Release | : 2017-08-31 |
| Genre | : Science |
| ISBN | : 3319658794 |
This thesis presents the first comprehensive analysis of quantum cascade laser nonlinear dynamics and includes the first observation of a temporal chaotic behavior in quantum cascade lasers. It also provides the first analysis of optical instabilities in the mid-infrared range. Mid-infrared quantum cascade lasers are unipolar semiconductor lasers, which have become widely used in applications such as gas spectroscopy, free-space communications or optical countermeasures. Applying external perturbations such as optical feedback or optical injection leads to a strong modification of the quantum cascade laser properties. Optical feedback impacts the static properties of mid-infrared Fabry–Perot and distributed feedback quantum cascade lasers, inducing power increase; threshold reduction; modification of the optical spectrum, which can become either single- or multimode; and enhanced beam quality in broad-area transverse multimode lasers. It also leads to a different dynamical behavior, and a quantum cascade laser subject to optical feedback can oscillate periodically or even become chaotic. A quantum cascade laser under external control could therefore be a source with enhanced properties for the usual mid-infrared applications, but could also address new applications such as tunable photonic oscillators, extreme events generators, chaotic Light Detection and Ranging (LIDAR), chaos-based secured communications or unpredictable countermeasures.
| Author | : Alexei Baranov |
| Publisher | : Elsevier |
| Total Pages | : 671 |
| Release | : 2013-04-23 |
| Genre | : Technology & Engineering |
| ISBN | : 0857096400 |
Semiconductor lasers have important applications in numerous fields, including engineering, biology, chemistry and medicine. They form the backbone of the optical telecommunications infrastructure supporting the internet, and are used in information storage devices, bar-code scanners, laser printers and many other everyday products. Semiconductor lasers: Fundamentals and applications is a comprehensive review of this vital technology.Part one introduces the fundamentals of semiconductor lasers, beginning with key principles before going on to discuss photonic crystal lasers, high power semiconductor lasers and laser beams, and the use of semiconductor lasers in ultrafast pulse generation. Part two then reviews applications of visible and near-infrared emitting lasers. Nonpolar and semipolar GaN-based lasers, advanced self-assembled InAs quantum dot lasers and vertical cavity surface emitting lasers are all considered, in addition to semiconductor disk and hybrid silicon lasers. Finally, applications of mid- and far-infrared emitting lasers are the focus of part three. Topics covered include GaSb-based type I quantum well diode lasers, interband cascade and terahertz quantum cascade lasers, whispering gallery mode lasers and tunable mid-infrared laser absorption spectroscopy.With its distinguished editors and international team of expert contributors, Semiconductor lasers is a valuable guide for all those involved in the design, operation and application of these important lasers, including laser and telecommunications engineers, scientists working in biology and chemistry, medical practitioners, and academics working in this field. - Provides a comprehensive review of semiconductor lasers and their applications in engineering, biology, chemistry and medicine - Discusses photonic crystal lasers, high power semiconductor lasers and laser beams, and the use of semiconductor lasers in ultrafast pulse generation - Reviews applications of visible and near-infrared emitting lasers and mid- and far-infrared emitting lasers
| Author | : G. Shvets |
| Publisher | : World Scientific |
| Total Pages | : 469 |
| Release | : 2012 |
| Genre | : Science |
| ISBN | : 9814355283 |
Manipulation of plasmonics from nano to micro scale. 1. Introduction. 2. Form-Birefringent metal and its plasmonic anisotropy. 3. Plasmonic photonic crystal. 4. Fourier plasmonics. 5. Nanoscale optical field localization. 6. Conclusions and outlook -- 11. Dielectric-loaded plasmonic waveguide components. 1. Introduction. 2. Design of waveguide dimensions. 3. Sample preparation and near-field characterization. 4. Excitation and propagation of guided modes. 5. Waveguide bends and splitters. 6. Coupling between waveguides. 7. Waveguide-ring resonators. 8. Bragg gratings. 9. Discussion-- 12. Manipulating nanoparticles and enhancing spectroscopy with surface plasmons. 1. Introduction. 2. Propulsion of gold nanoparticles with surface plasmon polaritons. 3. Double resonance substrates for surface-enhanced raman spectroscopy. 4. Conclusions and outlook -- 13. Analysis of light scattering by nanoobjects on a plane surface via discrete sources method. 1. Introduction. 2. Light scattering by a nanorod. 3. Light scattering by a nanoshell. 4. Summary -- 14. Computational techniques for plasmonic antennas and waveguides. 1. Introduction. 2. Time domain solvers. 3. Frequency domain solvers. 4. Plasmonic antennas. 5. Plasmonic waveguides. 6. Advanced structures. 7. Conclusions
| Author | : Mauro F. Pereira |
| Publisher | : Springer |
| Total Pages | : 196 |
| Release | : 2017-08-02 |
| Genre | : Science |
| ISBN | : 9402410937 |
This work is intended to jointly address the development, realization and applications of emitters and detectors of terahertz (THz-0.3 THz up to 10 THz) and their application to diagnostics of CBRN effects and detection of explosives and CBRN. Hazardous substances typically exhibit rotational and vibrational transitions in this region, hence giving access to spectroscopic analysis of a large variety of molecules which play a key role in security as well as various other areas, e.g. air pollution, climate research, industrial process control, agriculture, food industry, workplace safety and medical diagnostics can be monitored by sensing and identifying them via THz (0.3 to 10 THz) and mid infrared (MIR-10 THz to 100 THz) absorption “finger prints”. Most plastics, textiles and paper are nearly transparent for THz radiation.
