Download or read book One and Two photon Pumped Organic Semiconductor Lasers written by Georgios Tsiminis and published by . This book was released on 2010 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organic Lasers written by Marco Anni and published by CRC Press. This book was released on 2018-05-24 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past 30 years, organic conjugated molecules have received a lot of attention in research because of their unique combination of active properties typical of semiconductors and the technological appeal typical of plastic materials. Among the different applications proposed for organic materials, organic lasers are quickly approaching the performance required in real devices, while research on novel active materials is still ongoing. The book covers the basic aspects of the measurement techniques of optical gain and amplified spontaneous emission (ASE) in organic films as well as the photophysics of organic materials that can be understood using ASE measurements. It reviews the recent advances in the development of new active materials for organic lasers as well as the actual state of the art of scattering-assisted random lasers and of strongly coupled organic microcavities, both promising interesting developments in the near future. Finally, it gives a detailed review of the state of the art of the organic lasers actually closest to real applications, namely external cavity lasers and distributed feedback lasers. The book is unique that it covers basic aspects, technological aspects, and systems, which are still a subject of basic science research.

Download or read book Organic Solid State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.

Download or read book Introduction to Organic Electronic Devices written by Guangye Zhang and published by Springer Nature. This book was released on 2022-10-13 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively describes organic electronic devices developed in the past decades. It not only covers the mainstream devices including organic light emitting diodes (OLEDs), organic photovoltaics (OPVs), and organic thin-film transistors (OTFTs) but also includes devices of recent interest such as organic immune transistors, organic photocatalysis devices, and themoelectrical devices. The book starts from the introduction of basic theory of organic semiconductor materials and devices, which acquaints the readers with the concepts of each type of device described in the following chapters. It also discusses the working principles, device layout, and fabrication process of these devices. The book is intended for undergraduate and postgraduate students who are interested in organic electronics, researchers/engineers working in the field of organic electronic devices/systems.

Download or read book Ultrafast Dynamics and Laser Action of Organic Semiconductors written by Zeev Valy Vardeny and published by CRC Press. This book was released on 2009-01-21 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spurred on by extensive research in recent years, organic semiconductors are now used in an array of areas, such as organic light emitting diodes (OLEDs), photovoltaics, and other optoelectronics. In all of these novel applications, the photoexcitations in organic semiconductors play a vital role. Exploring the early stages of photoexcitations that

Download or read book Two photon Photoemission of Organic Semiconductor Molecules on Ag 111 written by Aram Yang and published by . This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra high q Optical Microcavities written by Yun-feng Xiao and published by World Scientific. This book was released on 2020-10-29 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Confinement and manipulation of photons using microcavities have triggered intense research interest in both basic and applied physics for more than a decade. Prominent examples are whispering gallery microcavities which confine photons by means of continuous total internal reflection along a curved and smooth surface. The long photon lifetime, strong field confinement, and in-plane emission characteristics make them promising candidates for enhancing light-matter interactions on a chip. In this book, we will introduce different ultra-high-Q whispering gallery microcavities, and focus on their applications in enhancing light-matter interaction, such as ultralow-threshold microlasing, highly sensitive optical biosensing, nonlinear optics, cavity quantum electrodynamics and cavity optomechanics.

Download or read book Lasers and Masers written by and published by . This book was released on 1962 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Halide Perovskites for Generation Manipulation and Detection of Light written by Juan P. Martínez-Pastor and published by Elsevier. This book was released on 2023-07-20 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Halide Perovskites for Generation, Manipulation and Detection of Light covers the current state and future prospects of lead halide perovskite photonics and photon sources, both from an academic and industrial point-of-view. Advances in metal halide perovskite photon sources (lasers) based on thin films, microcrystals and nanocrystals are comprehensively reviewed, with leading experts contributing current advances in theory, fundamental concepts, fabrication techniques, experiments and other important research innovations. This book is suitable for graduate students, researchers, scientists and engineers in academia and R&D in industry working in the disciplines of materials science and engineering. - Includes comprehensive reviews from academic and industrial perspectives of current trends in the field of metal halide perovskite for photonics - Provides an up-to-date look at the most recent and upcoming applications in metal halide perovskite photonics, such as; photodetectors, lighting, lasing, nonlinear photonics and quantum technologies - Discusses future prospective trends and envisioned applications of metal halide perovskites, from near-UV to near-IR photonics

Download or read book One and Two Photon Optically Pumped Laser Devices New Chemical Laser Diagnostics and Kinetic Probes written by Robert W. Field and published by . This book was released on 1980 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research programs in four general areas have resulted in publication of 16 papers, with 10 more in preparation. These areas include: optically pumped I2 B-X electronic transition laser; laser spectroscopy of alkaline earth halides; development of a new technique, Stimulated Emission Pumping, by which highly excited vibrational levels of combustion species may be selectively prepared and examined; optically pumped Na2 B-X laser. (Author).

Download or read book Laser Stimulated Scattering and Multiphoton Excitation written by Guang S. He and published by Oxford University Press. This book was released on 2022-02-25 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Laser stimulated scattering and multiphoton excitation is the first book to comprehensively cover laser stimulated scattering studies and laser multiphoton excitation-related studies. It is essential reading for academics, research scientists, and students working or interested in the areas of nonlinear optics, nonlinear photonics, laser spectroscopy, physical optics, physical chemistry, and optoelectronic engineering. Featuring cutting-edge discussions of new discoveries in the field, including stimulated Rayleigh-Bragg scattering (SRBS) and stimulated Mie scattering (SMS), the book also examines multiphoton excitation-based nonlinear optical effects, photoelectric effects, atomic and molecular ionizatoin effects, and molecular dissociation effects. Each major stimulated scattering effect is presented in its own chapter, alongside a description of the key concepts and mechanisms, as well as the necessary theoretical formulations. Furthermore, this is an engaging text that explains the latest experimental research achievements and their scientific and technological applications."--Back cover

Download or read book Charge Dynamics in Organic Semiconductors written by Pascal Kordt and published by Walter de Gruyter GmbH & Co KG. This book was released on 2016-09-12 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the field of organic semiconductors researchers and manufacturers are faced with a wide range of potential molecules. This work presents concepts for simulation-based predictions of material characteristics starting from chemical stuctures. The focus lies on charge transport – be it in microscopic models of amorphous morphologies, lattice models or large-scale device models. An extensive introductory review, which also includes experimental techniques, makes this work interesting for a broad readership. Contents: Organic Semiconductor Devices Experimental Techniques Charge Dynamics at Dierent Scales Computational Methods Energetics and Dispersive Transport Correlated Energetic Landscapes Microscopic, Stochastic and Device Simulations Parametrization of Lattice Models Drift–Diusion with Microscopic Link

Download or read book Low threshold organic thin film laser devices written by Christian Karnutsch and published by Cuvillier Verlag. This book was released on 2007-07-25 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, low threshold organic semiconductor lasers emitting throughout the entire visible wavelength range are presented. Organic semiconductor lasers (OSLs) are a fascinating class of laser devices that have a huge potential for sensing and display applications. Their ease of fabrication and tuneability across the full visible wavelength range are only a few of their advantageous properties which fueled intense research towards organic laser devices. For future electrically pumped organic lasers, as well as for compact (laser) diode-pumped devices, reduction of the organic laser threshold is of crucial importance, since low optically pumped thresholds translate into lower current densities required for injection lasing. With blue-emitting one-dimensional first- and second-order distributed feedback (DFB) lasers based on the copolymer BN-PFO , laser operation in a wavelength range from 438 to 459 nm was realized. For an optimized second-order laser, we obtained a very low threshold energy of 280 pJ/pulse, which could be further reduced to 160 pJ/pulse by employing first-order feedback. These very low threshold values render BN-PFO a very promising material for future organic semiconductor laser diodes. Furthermore, we have investigated DFB lasers based on a mixed-order resonator concept and the polyfluorene derivative F8DP . We showed that this improved resonator concept is a very promising design which combines the advantages of first- and second-order DFB resonators. By varying the grating parameters, organic solid-state lasers with customized properties can be fabricated. Optimizing the polymer film parameters led to a very low laser threshold of 45 pJ/pulse ( 36 nJ/cm2), which is among the lowest values ever reported for organic semiconductor lasers. These DFB lasers have been optically pumped by frequency-tripled Nd:YVO4 lasers or complex optical parametric oscillator (OPO) systems, resulting in versatile but expensive and bulky laser sources. For many applications, e.g. for laser-based analytical techniques and sensors, much more compact and inexpensive all solid-state laser sources are desirable. Whilst an organic injection laser doesn’t exist, it might prove useful for numerous applications to adopt an indirect electrical pumping scheme using efficient and compact electrically driven light sources to pump an OSL optically. The recent evolution of blue-violet emitting inorganic (In)GaN laser diodes renders them attractive as such a pump source. During the course of this work, a very compact all solid-state laser system using a low-cost pulsed (In)GaN laser diode has been realized. Laser emission spanning the complete visible wavelength range was achieved by employing a variety of organic materials and resonator geometries. As a future asset, these hybrid organic/inorganic lasers could be made mechanically tuneable by either using a wedge-shaped organic thin-film or by spatially varying the lattice period. Both concepts alter the emission wavelength when the organic laser is moved mechanically in front of the focussed pump laser diode. These hybrid laser systems could provide the basis for innovative portable analysis systems, e.g. for medical point-of-care sensor systems. An even lower-cost pumping scheme based on LEDs could lead to extremely low-cost and versatile laser sources emitting throughout the entire visible wavelength range. But the ultimate goal remains the realization of an electrically pumped organic laser diode. In the course of this thesis, a self-consistent numerical simulation tool was employed to carry out comprehensive investigations of the influence of various parameters on the laser threshold in electrically pumped multilayer OSLs. It could be shown that the threshold current densities necessary for lasing in an organic laser diode structure will be of the order of 500-1000 A/cm2. The main reasons for these high threshold values are: • waveguide losses • excited state absorptions • bimolecular annihilation processes In order to reduce the waveguide losses, two concepts have been discussed: either using thin active layers in combination with low-loss transparent conductive oxide (TCO) electrode materials, or using thick (doped) multilayer devices with metal electrodes. The threshold current density is also negatively influenced by polaron and excited state absorption. The dimensionless quantity, ς has been introduced to quantify the effect of polaron and excited state absorption in the device. It saturates at increasing current densities, implying that polaron- and triplet-triplet absorption might prevent electrically pumped devices from lasing for all current densities, depending on the respective absorption cross sections. It was shown that ς does not strongly depend on the device geometry. For the studied devices, an increased charge carrier mobility in the transport layers does not reduce polaron absorption significantly, but if the mobilities in the emission layer and in the transport layers could be increased simultaneously, the effect of polaron absorption would be reduced. We also investigated the influence of bimolecular annihilation processes on the threshold current density using numerical simulations. For a set of typical annihilation and material parameters, the threshold current density was calculated to be ≈560 A/cm2. It was found to depend critically on the emission layer thickness. Singlet-polaron and singlet-triplet annihilations were identified as the dominating quenching processes for the investigated parameter range. According to the presented numerical simulations, organic laser diodes will require very high current densities, hence the current durability of organic materials will be an important issue. Dielectric discharges and thermal breakdown were identified as the major causes for catastrophic device failure under high excitation conditions. Thus, thermal management was identified as a key element to improve device stability. To reduce the thermal load of the devices, high thermal conductivity substrates or pulsed operation can be employed. We were able to demonstrate that organic materials can indeed sustain the required current densities. In high current excitation experiments, more than 550 A/cm2 could be passed through a thick photocrosslinked hole-transport layer in pulsed mode. This very encouraging and significant result shows that photocrosslinked all-polymer devices might be the proper choice to realize an organic injection laser. Apart from the concepts elucidated above, further approaches to an organic injection laser exist. Recently, ambipolar light-emitting organic field-effect transistor (OFET) geometries were discussed in the context of OSLs. But to date, the achieved current densities are typically about one order of magnitude too low. Another promising novel approach is to induce capacitively coupled lasing action in OSLs. An organic active material is sandwiched between two dielectric-clad electrodes and excited via an AC voltage. This is advantageous as it avoids the optical losses associated with injecting electrodes close to the active layer. This concept will be evaluated in the near future in our group at the LTI .

Download or read book Applied Nanophotonics written by Hilmi Volkan Demir and published by Cambridge University Press. This book was released on 2018-11-22 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accessible yet rigorous introduction to nanophotonics, covering basic principles, technology, and applications in lighting, lasers, and photovoltaics. Providing a wealth of information on materials and devices, and over 150 color figures, it is the 'go-to' guide for students in electrical engineering taking courses in nanophotonics.

Download or read book Electronic Processes in Organic Semiconductors written by Anna Köhler and published by John Wiley & Sons. This book was released on 2015-04-22 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first advanced textbook to provide a useful introduction in a brief, coherent and comprehensive way, with a focus on the fundamentals. After having read this book, students will be prepared to understand any of the many multi-authored books available in this field that discuss a particular aspect in more detail, and should also benefit from any of the textbooks in photochemistry or spectroscopy that concentrate on a particular mechanism. Based on a successful and well-proven lecture course given by one of the authors for many years, the book is clearly structured into four sections: electronic structure of organic semiconductors, charged and excited states in organic semiconductors, electronic and optical properties of organic semiconductors, and fundamentals of organic semiconductor devices.

Download or read book An Introduction to Organic Lasers written by Azzedine Boudrioua and published by ISTE Press - Elsevier. This book was released on 2017-07-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the biggest challenges of organic optoelectronics is the realization of the first organic laser diode (electrically pumped) which has a very strong potential for many applications. Similar to what happened in the field of inorganic optoelectronics when transforming LEDs into LDs, the race is on to transform an OLED into an OLD. This involves the development of innovative solutions to overcome the difficulties inherent in organic materials and the electric pump. This book presents the elements of physics, materials and technologies that allow us to understand the basics of organic lasers and to capture the progress made. It also provides guidance for future developments towards the organic laser diode.

Download or read book Nonlinear Optics and Photonics written by Guangsheng He and published by . This book was released on 2015 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive presentation on most of the major topics in nonlinear optics and photonics, with equal emphasis on principles, experiments, techniques, and applications. It covers many major new topics including optical solitons, multi-photon effects, nonlinear photoelectric effects, fast and slow light , and Terahertz photonics. Chapters 1-10 present the fundamentals of modern nonlinear optics, and could be used as a textbook with problems provided at the end of each chapter. Chapters 11-17 cover the more advanced topics of techniques and applications of nonlinear optics and photonics, serving as a highly informative reference for researchers and experts working in related areas. There are also 16 pages of color photographs to illustrate the visual appearances of some typical nonlinear optical effects and phenomena. The book could be adopted as a textbook for both undergraduates and graduate students, and serve as a useful reference work for researchers and experts in the fields of physics, quantum electronics, and laser technology. To request a copy of the Solutions Manual, visit: //global.oup.com/uk/academic/physics/admin/solutions