Design Of Computational Imaging Systems Using Wavefront Coded Dielectric Metasurfaces
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| Author | : Shane Colburn |
| Publisher | : |
| Total Pages | : 135 |
| Release | : 2020 |
| Genre | : |
| ISBN | : |
High-quality cameras are widely accessible today owing to the ubiquity of smartphones and the miniaturization of sensors driven by improvements in manufacturing. These cameras, however, still rely on assemblies of aberration-correcting, refractive elements that are fundamentally the same technology in use for optical systems for centuries. While for smartphones these assemblies can be made sufficiently small, these lenses present a bulky form factor for the most stringent size and weight-constrained applications. One candidate for enabling further miniaturization is metasurfaces, which are ultrathin surfaces comprising arrays of subwavelength-spaced, spatially varying scatterers. By locally tailoring the response of each scatterer, metasurfaces can manipulate the phase, amplitude, and polarization of wavefronts at subwavelength resolution with only a wavelength-scale thickness. While promising for next-generation miniaturized optics, in an imaging context, metasurfaces exhibit significant aberrations. Most metasurface research has also focused on producing static elements, which pose a challenge for systems that require varifocal control. While there has been significant work towards circumventing these challenges through innovations in scatterer design, such approaches often entail tradeoffs in terms of system complexity, polarization dependence, efficiency, and limitations on scaling to large area apertures. In this dissertation, we instead examine the utility of computational imaging in conjunction with metasurfaces so that we can simultaneously enhance performance while maintaining the size benefits offered by metasurfaces. In a computational imaging system, software is treated as a component in the image formation process. Here, we examine this approach by exploring several different imaging modalities supported by metasurfaces combined with computation so that we can simultaneously deliver a compact form factor and high-quality images. These modalities include imaging in full color, varifocal zoom capability, and acquiring depth information from a scene. Through a combination of wavefront coding, deconvolution, and Alvarez lens-inspired conjugate metasurfaces, we demonstrate a set of separate metasurface systems that image over the full visible spectrum, can achieve more than 200% change in focal length with a 1 cm aperture, and can discriminate depths with a fractional ranging error of 1.7%. The demonstrated approach may find applications in microscopy, planar cameras, machine vision, and augmented reality.
| Author | : Zi-Lan Deng |
| Publisher | : Springer Nature |
| Total Pages | : 68 |
| Release | : 2022-05-31 |
| Genre | : Science |
| ISBN | : 3031023862 |
The merging of metasurface and holography brings about unprecedented opportunities for versatile manipulation of light in terms of both far-field wavefront and near-field profile. In this book, a brief evolving history from surface plasmon polariton holography to metamaterial holography and finally to metasurface holography is introduced at first. Basic physical mechanisms that govern the phase modulation rules behind metasurface holography design are discussed later. Next, extended functionalities such as arbitrary polarization holography, vectorial holography, full-color holography, and hybrid holography achieved in the metasurface platform are presented. Surface wave and metagrating holography that bridges the on-chip surface wave and free-space wave is also introduced. In the end, we envisage practical applications of high-fidelity 3D holographic display, high-secure encryption, and high capacity digital encoding and also indicate remaining challenges based on metasurface holography.
| Author | : Igal Brener |
| Publisher | : Woodhead Publishing |
| Total Pages | : 310 |
| Release | : 2019-10-15 |
| Genre | : Science |
| ISBN | : 0081024037 |
Dielectric Metamaterials: Fundamentals, Designs and Applications links fundamental Mie scattering theory with the latest dielectric metamaterial research, providing a valuable reference for new and experienced researchers in the field. The book begins with a historical, evolving overview of Mie scattering theory. Next, the authors describe how to apply Mie theory to analytically solve the scattering of electromagnetic waves by subwavelength particles. Later chapters focus on Mie resonator-based metamaterials, starting with microwaves where particles are much smaller than the free space wavelengths. In addition, several chapters focus on wave-front engineering using dielectric metasurfaces and the nonlinear optical effects, spontaneous emission manipulation, active devices, and 3D effective media using dielectric metamaterials. Highlights a crucial link in fundamental Mie scattering theory with the latest dielectric metamaterial research spanning materials, design and applications Includes coverage of wave-front engineering and 3D metamaterials Provides computational codes for calculating and simulating Mie resonances
| Author | : Sergey I. Bozhevolnyi |
| Publisher | : MDPI |
| Total Pages | : 167 |
| Release | : 2018-11-16 |
| Genre | : Mathematics |
| ISBN | : 3038973440 |
This book is a printed edition of the Special Issue "Metasurfaces: Physics and Applications" that was published in Applied Sciences
| Author | : Rudolf Kingslake |
| Publisher | : Elsevier |
| Total Pages | : 347 |
| Release | : 1989-11-22 |
| Genre | : Computers |
| ISBN | : 0080508170 |
The lens is generally the most expensive and least understood part of any camera. In this book, Rudolf Kingslake traces the historical development of the various types of lenses from Daguerre's invention of photography in 1839 through lenses commonly used today.From an early lens still being manufactured for use in low-cost cameras to designs made possible through such innovations as lens coating, rare-earth glasses, and computer aided lens design and testing, the author details each major advance in design and fabrication. The book explains how and why each new lens type was developed, and why most of them have since been abandoned. This authoritative history of lens technology also includes brief biographies of several outstanding lens designers and manufacturers of the past.
| Author | : Donald C. O'Shea |
| Publisher | : SPIE Press |
| Total Pages | : 266 |
| Release | : 2004 |
| Genre | : Science |
| ISBN | : 9780819451712 |
This book provides the reader with the broad range of materials that were discussed in a series of short courses presented at Georgia Tech on the design, fabrication, and testing of diffractive optical elements (DOEs). Although there are not long derivations or detailed methods for specific engineering calculations, the reader should be familiar and comfortable with basic computational techniques. This text is not a 'cookbook' for producing DOEs, but it should provide readers with sufficient information to assess whether this technology would benefit their work, and to understand the requirements for using the concepts and techniques presented by the authors.
| Author | : Ulf Schnars |
| Publisher | : Springer |
| Total Pages | : 233 |
| Release | : 2014-09-19 |
| Genre | : Technology & Engineering |
| ISBN | : 3662446936 |
This highly practical and self-contained guidebook explains the principles and major applications of digital hologram recording and numerical reconstruction (Digital Holography). A special chapter is designated to digital holographic interferometry with applications in deformation and shape measurement and refractive index determination. Applications in imaging and microscopy are also described. Spcial techniques such as digital light-in-flight holography, holographic endoscopy, information encrypting, comparative holography, and related techniques of speckle metrology are also treated
| Author | : Costantino De Angelis |
| Publisher | : CRC Press |
| Total Pages | : 345 |
| Release | : 2020-05-20 |
| Genre | : Technology & Engineering |
| ISBN | : 1351269755 |
This book addresses fabrication as well as characterization and modeling of semiconductor nanostructures in the optical regime, with a focus on nonlinear effects. The visible range as well as near and far infrared spectral region will be considered with a view to different envisaged applications. The book covers the current key challenges of the research in the area, including: exploiting new material platforms, fully extending the device operation into the nonlinear regime, adding re-configurability to the envisaged devices and proposing new modeling tools to help in conceiving new functionalities. • Explores several topics in the field of semiconductor nonlinear nanophotonics, including fabrication, characterization and modeling of semiconductor nanostructures in the optical regime, with a focus on nonlinear effects • Describes the research challenges in the field of optical metasurfaces in the nonlinear regime • Reviews the use and achievements of all-dielectric nanoantennas for strengthening the nonlinear optical response • Describes both theoretical and experimental aspects of photonic devices based on semiconductor optical nanoantennas and metasurfaces • Gathers contributions from several leading groups in this research field to provide a thorough and complete overview of the current state of the art in the field of semiconductor nonlinear nanophotonics Costantino De Angelis has been full professor of electromagnetic fields at the University of Brescia since 1998. He is an OSA Fellow and has been responsible for several university research contracts in the last 20 years within Europe, the United States, and Italy. His technical interests are in optical antennas and nanophotonics. He is the author of over 150 peer-reviewed scientific journal articles. Giuseppe Leo has been a full professor in physics at Paris Diderot University since 2004, and in charge of the nonlinear devices group of MPQ Laboratory since 2006. His research areas include nonlinear optics, micro- and nano-photonics, and optoelectronics, with a focus on AlGaAs platform. He has coordinated several research programs and coauthored 100 peer-reviewed journal articles, 200 conference papers, 10 book chapters and also has four patents. Dragomir Neshev is a professor in physics and the leader of the experimental photonics group in the Nonlinear Physics Centre at Australian National University (ANU). His activities span over several branches of optics, including nonlinear periodic structures, singular optics, plasmonics, and photonic metamaterials. He has coauthored 200 publications in international peer-reviewed scientific journals.
| Author | : Karim Achouri |
| Publisher | : John Wiley & Sons |
| Total Pages | : 226 |
| Release | : 2021-05-11 |
| Genre | : Science |
| ISBN | : 1119525160 |
Discover a comprehensive exploration of recent developments and fundamental concepts in the applications of metasurfaces. In Electromagnetic Metasurfaces: Theory and Applications, distinguished researchers and authors Karim Achouri and Christophe Caloz deliver an introduction to the fundamentals and applications of metasurfaces and an insightful analysis of recent and future developments in the field. The book describes the precursors and history of metasurfaces before continuing on to an exploration of the physical insights that can be gleaned from the material parameters of the metasurface. You’ll learn how to compute the fields scattered by a metasurface with known material parameters being illuminated by an arbitrary incident field, as well as how to realize a practical metasurface and relate its material parameters to its physical structures. The authors provide examples to illustrate all the concepts discussed in the book to improve and simplify reader understanding. Electromagnetic Metasurfaces concludes with an incisive discussion of the likely future directions and research opportunities in the field. Readers will also benefit from the inclusion of: A thorough introduction to metamaterials, the concept of metasurfaces, and metasurface precursors An exploration of electromagnetic modeling and theory, including metasurfaces as zero-thickness sheets and bianisotropic susceptibility tensors A practical discussion of susceptibility synthesis, including four-parameters synthesis, more than four-parameters synthesis, and the addition of susceptibility components A concise treatment of scattered-field analysis, including approximate analytical methods, and finite-difference frequency-domain techniques Perfect for researchers in metamaterial sciences and engineers working with microwave, THz, and optical technologies, Electromagnetic Metasurfaces: Theory and Applications will also earn a place in the libraries of graduate and undergraduate students in physics and electrical engineering.
| Author | : Artem Boriskin |
| Publisher | : Springer |
| Total Pages | : 494 |
| Release | : 2017-09-05 |
| Genre | : Technology & Engineering |
| ISBN | : 3319627732 |
This book presents the technology of millimetre waves and Terahertz (THz) antennas. It highlights the importance of moderate and high-gain aperture antennas as key devices for establishing point-to-point and point-to-multipoint radio links for far-field and near-field applications, such as high data-rate communications, intelligent transport, security imaging, exploration and surveillance systems. The book provides a comprehensive overview of the key antenna technologies developed for the mm wave and THz domains, including established ones – such as integrated lens antennas, advanced 2D and 3D horn antennas, transmit and reflect arrays, and Fabry-Perot antennas – as well as emerging metasurface antennas for near-field and far-field applications. It describes the pros and cons of each antenna technology in comparison with other available solutions, a discussion supplemented by practical examples illustrating the step-by-step implementation procedures for each antenna type. The measurement techniques available at these frequency ranges are also presented to close the loop of the antenna development cycle. In closing, the book outlines future trends in various antenna technologies, paving the way for further developments. Presenting content originating from the five-year ESF research networking program ‘Newfocus’ and co-authored by the most active and highly cited research groups in the domain of mm- and sub-mm-wave antenna technologies, the book offers a valuable guide for researchers and engineers in both industry and academia.
