Download or read book Electromagnetic Wave Manipulation with Plasma Metamaterials written by Jesse Alexander Rodriguez and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterial devices, the first examples of which appeared in the late 1990's, represent the cutting edge of electromagnetic wave manipulation. By creating these engineered materials, we can enhance antennas, create novel `superlenses', design cloaking devices, and reduce radar cross sections, among many other applications. As we move into the mid 2020's, metamaterial devices are being used to pursue even more exotic device functions such as optical computing, a new computing paradigm in which computation is performed with light signals as opposed to electronic signals. Optical computing devices, like matrix-vector multiplication accelerators and analog neural networks for classification and sequence processing, are a new frontier in optics where significant leaps forward can be made in speed and bandwidth when compared to conventional computing technology. This dissertation is focused on the use of plasma elements in metamaterial devices. Plasma has a unique electromagnetic response that is easily tunable, allowing for the construction of dynamic optical devices that are actively reconfigurable. This attribute of plasma makes it an ideal material for metamaterial devices that are designed to perform complex tasks such as optical computing since the functionality of the device need not be 'frozen-in' upon fabrication, leading to the possibility for more generalized, reconfigurable optical computing devices. The inclusion of plasma can also enhance and lend tunability to conventional optical devices. To explore the suitability of plasma metamaterial devices for these types of applications, we first conduct a search for complex device functionality in 3D plasma photonic crystal (PPC) devices and 2D magnetized plasma photonic crystal devices. A hybrid dielectric-plasma 3D photonic crystal bandgap device is constructed and the effects of the inclusion of a small number of under-dense plasma elements are studied. Although the effects are small, the transmission bandgaps of the device are shown to be reliably tunable in amplitude and frequency as the plasma density of the elements is varied. A 3D woodpile structure photonic crystal badgap device composed entirely of plasma elements is likewise constructed and tested, showing that polarization-dependent phenomena that cannot be simultaneously observed in 2D PPCs can couple together to produce enhanced performance of the device. After confirming the gyrotropic response of our plasma elements, we then proceed to produce 2D magnetized PPCs that exhibit topologically protected, backscattering immune one-way edge states and zero-index-medium behavior, leading to cloaking of embedded objects. To take advantage of these complex phenomena, we then moved to develop techniques for designing plasma metamaterials that do not need to rely on intuitive design. We use automatic inverse design methodology to produce plasma metamaterials (PMMs) with a simple 2D lattice structure that can perform the tasks of beam steering, demultiplexing, and even boolean logic with high efficacy. After confirming that the aforementioned devices were experimentally feasible by taking into account non-ideal factors like loss, nonuniform plasma elements, and experimental noise, we constructed the PMM experimental platform. First, we tested the optimal device configuration from the computational inverse design algorithm and found that the devices perform their intended function but not with very high efficacy. Because the plasma elements are dynamically tunable, fully in-situ inverse design of the devices is possible, and so an experimental optimization was performed, leading to a ~100x improvement on the computational inverse design configurations.
Download or read book The Propagation of Electromagnetic Waves in Plasmas written by Vitaliĭ Lazarevich Ginzburg and published by Pergamon. This book was released on 1970 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Much attention has been given also to various sepecific problems, in particular the propagation and generation of waves in the Earth's ionosphere and magnetosphere, in the interplanetary plasma, and in laboratory apparatus, as well as solid-state plasmas." -- p. xiii.
Download or read book On the Interpenetration of a Plasma and Its Confining Electromagnetic Wave Field written by Erich S. Weibel and published by . This book was released on 1957 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Waves For Thermonuclear Fusion Research written by Ernesto Mazzucato and published by World Scientific. This book was released on 2014-04-02 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: The science of magnetically confined plasmas covers the entire spectrum of physics from classical and relativistic electrodynamics to quantum mechanics. During the last sixty years of research, our initial primitive understanding of plasma physics has made impressive progress thanks to a variety of experiments — from tabletop devices with plasma temperatures of a few thousands of degrees and confinement times of less than 100 microseconds, to large tokamaks with plasma temperatures of up to five hundred million degrees and confinement times approaching one second. We discovered that plasma confinement is impaired by a variety of instabilities leading to turbulent processes with scales ranging from the plasma size to a few millimeters. Understanding these phenomena, which have slowed down progress towards a fusion reactor, requires the use of very sophisticated diagnostic tools, many of which employ electromagnetic waves.The primary objective of this book is to discuss the fundamental physics upon which the application of electromagnetic waves to the study of magnetically confined plasmas is based.
Download or read book The Propagation of Electromagnetic Waves in Plasma written by V. L. Ginzburg and published by . This book was released on 1964 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Theoretical Investigation of Electromagnetic Waves Obliquely Incident Upon a Plasma Slab written by Calvin T. Swift and published by . This book was released on 1970 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of an electromagnetic wave obliquely incident upon a plasma slab is considered as a boundary-value problem by use of a self-consistent solution of the coupled linearized Vlasov and Maxwell equations. Power reflection, transmission, and absorption coefficients are derived under the assumption that all particles undergo specular reflection at the surfaces of the plasma slab. Although the analysis is valid for arbitrary slab thickness, computational results are presented for slabs which are thin when compared with a wavelength. The results show that a series of resonances occur which are attributed to the finite temperature of the plasma. The results further show that the resonances are Landau damped as the thermal velocity of the plasma electrons increases. It is shown that similar resonances can be predicted from the coupled linearized hydrodynamic Maxwell equations; however, as is well known, such a model does not predict Landau damping. The effects of a finite collision frequency are then included by means of a simple Bhatnagar-Gross-Krook (BGK) collision term. The numerical computations vividly indicate that the resonances undergo severe damping for extremely small ratios of the collision frequency to the signal frequency. Finally, the plasma capacitor problem is considered, and the results indicate that the longitudinal resonances have characteristics very similar to those of the plane-wave resonances.
Download or read book Propagation of Electromagnetic Waves in Plasma written by Vitaliĭ Lazarevich Ginzburg and published by . This book was released on 1962 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffusionics written by Fu-Bao Yang and published by Springer Nature. This book was released on with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propagation of electromagnetic waves in plasma written by V. L. Ginzburg and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interaction of Strong Electromagnetic Fields with Plasmas written by Ivan Romanovich Gekker and published by Oxford University Press, USA. This book was released on 1982 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The range of plasma conditions considered here is intentionally broad, systematic and relevant to such areas as plasma heating, plasma acceleration, laser-plasma interaction, and plasma confinement. This volume presents the principle concepts of plasma physics - with an account of the linear theory of electromagnetic wave interaction - and then covers nonlinear processes with extensive treatment of the pondermotive force. Related experimental work is thoroughly reviewed.
Download or read book The Propagation of Electromagnetic Waves in Plasmas written by and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Propagation of Electromagnetic Waves in Plasmas written by Vitalij Lazarevic Ginzburg and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Fluctuations In Plasma written by A Sitenko and published by Elsevier. This book was released on 2012-12-02 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Fluctuations in Plasma focuses on the theoretical investigation of the electromagnetic properties of a plasma (an ionized gas). The manuscript first takes a look at the general theory of fluctuations and electromagnetic fluctuations in media with space-time dispersion. Discussions focus on spectral distribution of the fluctuations and energy dissipation in the medium; dielectric and magnetic permittivities in a medium with spatial dispersion; current, charge, and field fluctuations in a medium; and inversion of the fluctuation-dissipation theorem. The text then examines the electrodynamic properties of an electron plasma and electromagnetic fluctuations in an electron plasma. The publication ponders on fluctuations in an electron-ion plasma and electron plasma in a magnetic field. Topics include plasma dielectric permittivity tensor in a magnetic field; longitudinal plasma oscillations in a magnetic field; fluctuations in charge and current densities in an equilibrium electron-ion plasma; and electron and ion density fluctuations in an equilibrium plasma. The text also tackles the passage of charged particles through plasma and dynamic friction and diffusion coefficients in a plasma. The book is a dependable reference for readers interested in the study of the electromagnetic properties of a plasma.
Download or read book Hyperbolic Metamaterials written by Igor I Smolyaninov and published by Morgan & Claypool Publishers. This book was released on 2018-03-23 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hyperbolic metamaterials were originally introduced to overcome the diffraction limit of optical imaging. Soon thereafter it was realized that hyperbolic metamaterials demonstrate a number of novel phenomena resulting from the broadband singular behavior of their density of photonic states. These novel phenomena and applications include super resolution imaging, new stealth technologies, enhanced quantum-electrodynamic effects, thermal hyperconductivity, superconductivity, and interesting gravitation theory analogs. Here I review typical material systems, which exhibit hyperbolic behavior and outline important new applications of hyperbolic metamaterials, such as imaging experiments with plasmonic hyperbolic metamaterials and novel VCSEL geometries, in which the Bragg mirrors may be engineered in such a way that they exhibit hyperbolic properties in the long wavelength infrared range, so that they may be used to efficiently remove excess heat from the laser cavity. I will also discuss potential applications of self-assembled photonic hypercrystals. This system bypasses 3D nanofabrication issues, which typically limit hyperbolic metamaterial applications. Photonic hypercrystals combine the most interesting features of hyperbolic metamaterials and photonic crystals.
Download or read book Electromagnetic Metamaterials and Metasurfaces written by Long Li and published by Springer Nature. This book was released on 2024 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this book is the fast-developing area of research known as metamaterials/metasurfaces and some of their engineering applications. This book comprehensively presents the state of the art of metamaterials/metasurfaces from theory to applications. The theoretical side includes electrodynamics of left-handed medium, generalized Snell's law, digital coding metamaterials/metasurfaces, group theory of metamaterials, information metamaterials and metasurfaces, etc. On the application side, a wide range of design examples are discussed, including metamaterial antennas, electromagnetic interference, frequency selective surfaces, wireless power transmission and energy harvesting, cloaking and radar cross section reduction, orbital angular momentum, wireless communication, imaging, etc. The book provides researchers, engineers, and graduate students with a variety of new discoveries, results, information, and knowledge in the field of metamaterials and metasurfaces.
Download or read book Plasma as Metamaterial written by Rajneesh Kumar and published by LAP Lambert Academic Publishing. This book was released on 2011-03 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently an increased amount of research work has been focused on negative refractive index mediums or Metamaterials. Hence, this book is aimed at presenting the possible applications of plasma as a medium for negative/positive refraction of electromagnetic waves. In the reference of composite metamaterials, this book brings models to achieve negative refraction using plasma. In another approach, study is conducted on hybrid plasma photonic crystal, which reveals that positive and negative refraction can be achieved by switching ON and OFF the plasma. Therefore, this book invokes the concept that plasma can be used to enhance the tunability/controllability of composite metamaterials and photonic crystals.
Download or read book Waves in Metamaterials written by Laszlo Solymar and published by Oxford University Press. This book was released on 2009 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterials is a subject born in the 21st century. It is concerned with artificial materials which can have electrical and magnetic properties difficult or impossible to find in nature. The mathematics of the book is within the power of final year undergraduates: the aim is to explain the physics in simple terms and enumerate the major advances.
