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Metamaterials: Physics and Engineering Explorations

TL;DR: In this paper, the authors present a three-dimensional VOLUMEETRIC DNG METAMATERIALs, which are used to generate wave parameters in DNG Media.
Abstract: Preface. Contributors. PART I: DOUBLE-NEGATIVE (DNG) METAMATERIALS. SECTION I: THREE-DIMENSIONAL VOLUMETRIC DNG METAMATERIALS. CHAPTER 1: INTRODUCTION, HISTORY, AND SELECTED TOPICS IN FUNDAMENTAL THEORIES OF METAMATERIALS (Richard W. Ziolkowski and Nader Engheta). 1.1 Introduction. 1.2 Wave Parameters in DNG Media. 1.3 FDTD Simulations of DNG Media. 1.4 Causality in DNG Media. 1.5 Scattering from a DNG Slab. 1.6 Backward Waves. 1.7 Negative Refraction. 1.8 Phase Compensation with a DNG Medium. 1.9 Dispersion Compensation in a Transmission Line Using a DNG Medium. 1.10 Subwavelength Focusing with a DNG Medium. 1.11 Metamaterials with a Zero Index of Refraction. 1.12 Summary. References. CHAPTER 2: FUNDAMENTALS OF WAVEGUIDE AND ANTENNA APPLICATIONS INVOLVING DNG AND SNG METAMATERIALS (Nader Engheta, Andrea Alu, Richard W. Ziolkowski, and Aycan Erentok). 2.1 Introduction. 2.2 Subwavelength Cavities and Waveguides. 2.3 Subwavelength Cylindrical and Spherical Core-Shell Systems. 2.4 ENG-MNG and DPS-DNG Matched Metamaterial Pairs for Resonant Enhancements of Source-Generated Fields. 2.5 Efficient, Electrically Small Dipole Antennas: DNG Nested Shells. 2.6 Efficient, Electrically Small Dipole Antennas: ENG Nested Shells-Analysis. 2.7 Efficient, Electrically Small Dipole Antennas: HFSS Simulations of Dipole-ENG Shell Systems. 2.8 Metamaterial Realization of an Artificial Magnetic Conductor for Antenna Applications. 2.9 Zero-Index Metamaterials for Antenna Applications. 2.10 Summary. References. CHAPTER 3: WAVEGUIDE EXPERIMENTS TO CHARACTERIZE PROPERTIES OF SNG AND DNG METAMATERIALS (Silvio Hrabar). 3.1 Introduction. 3.2 Basic Types of Bulk Metamaterials with Inclusions. 3.3 Theoretical Analysis of Rectangular Waveguide Filled with General Metamaterial. 3.4 Investigation of Rectangular Waveguide Filled with 2D Isotropic ENG Metamaterial. 3.5 Investigation of Rectangular Waveguide Filled with 2D Isotropic MNG Metamaterial. 3.6 Investigation of Rectangular Waveguide Filled with 2D Uniaxial MNG Metamaterial. 3.7 Investigation of Rectangular Waveguide Filled with 2D Isotropic DNG Metamaterial. 3.8 Investigation of Subwavelength Resonator. 3.9 Conclusions. References. CHAPTER 4: REFRACTION EXPERIMENTS IN WAVEGUIDE ENVIRONMENTS (Tomasz M. Grzegorczyk, Jin Au Kong, and Ran Lixin). 4.1 Introduction. 4.2 Microscopic and Macroscopic Views of Metamaterials. 4.3 Measurement Techniques. 4.4 Conclusion. Acknowledgments. References. SECTION II: TWO-DIMENSIONAL PLANAR NEGATIVE-INDEX STRUCTURES. CHAPTER 5: ANTENNA APPLICATIONS AND SUBWAVELENGTH FOCUSING USING NEGATIVE-REFRACTIVE-INDEX TRANSMISSION LINE STRUCTURES (George V. Eleftheriades). 5.1 Introduction. 5.2 Planar Transmission Line Media with Negative Refractive Index. 5.3 Zero-Degree Phase-Shifting Lines and Applications. 5.4 Backward Leaky-Wave Antenna Radiating in Its Fundamental Spatial Harmonic. 5.5 Superresolving NRI Transmission Line Lens. 5.6 Detailed Dispersion of Planar NRI-TL Media. Acknowledgments. References. CHAPTER 6: RESONANCE CONE ANTENNAS (Keith G. Balmain and Andrea A. E. Luttgen). 6.1 Introduction. 6.2 Planar Metamaterial, Corner-Fed, Anisotropic Grid Antenna. 6.3 Resonance Cone Refraction Effects in a Low-Profile Antenna. 6.4 Conclusions. Acknowledgments. References. CHAPTER 7: MICROWAVE COUPLER AND RESONATOR APPLICATIONS OF NRI PLANAR STRUCTURES (Christophe Caloz and Tatsuo Itoh). 7.1 Introduction. 7.2 Composite Right/Left-Handed Transmission Line Metamaterials. 7.3 Metamaterial Couplers. 7.4 Metamaterial Resonators. 7.5 Conclusions. References. PART II: ELECTROMAGNETIC BANDGAP (EBG) METAMATERIALS. SECTION I: THREE-DIMENSIONAL VOLUMETRIC EBG MEDIA. CHAPTER 8: HISTORICAL PERSPECTIVE AND REVIEW OF FUNDAMENTAL PRINCIPLES IN MODELING THREE-DIMENSIONAL PERIODIC STRUCTURES WITH EMPHASIS ON VOLUMETRIC EBGs (Maria Kafesaki and Costas M. Soukoulis). 8.1 Introduction. 8.2 Theoretical and Numerical Methods. 8.3 Comparison of Different Numerical Techniques. 8.4 Conclusions. Acknowledgments. References. CHAPTER 9: FABRICATION, EXPERIMENTATION, AND APPLICATIONS OF EBG STRUCTURES (Peter de Maagt and Peter Huggard). 9.1 Introduction. 9.2 Manufacturing. 9.3 Experimental Characterization of EBG Crystals. 9.4 Current and Future Applications of EBG Systems. 9.5 Conclusions. References. CHAPTER 10: SUPERPRISM EFFECTS AND EBG ANTENNA APPLICATIONS (Boris Gralak, Stefan Enoch, and G-erard Tayeb). 10.1 Introduction. 10.2 Refractive Properties of a Piece of Photonic Crystal. 10.3 Superprism Effect. 10.4 Antenna Applications. 10.5 Conclusion. References. SECTION II: TWO-DIMENSIONAL PLANAR EBG STRUCTURES. CHAPTER 11: REVIEW OF THEORY, FABRICATION, AND APPLICATIONS OF HIGH-IMPEDANCE GROUND PLANES (Dan Sievenpiper). 11.1 Introduction. 11.2 Surface Waves. 11.3 High-Impedance Surfaces. 11.4 Surface Wave Bands. 11.5 Reflection Phase. 11.6 Bandwidth. 11.7 Design Procedure. 11.8 Antenna Applications. 11.9 Tunable Impedance Surfaces. 11.10 Reflective-Beam Steering. 11.11 Leaky-Wave Beam Steering. 11.12 Backward Bands. 11.13 Summary. References. CHAPTER 12: DEVELOPMENT OF COMPLEX ARTIFICIAL GROUND PLANES IN ANTENNA ENGINEERING (Yahya Rahmat-Samii and Fan Yang). 12.1 Introduction. 12.2 FDTD Analysis of Complex Artificial Ground Planes. 12.3 Various Complex Artificial Ground-Plane Designs. 12.4 Applications of Artificial Ground Planes in Antenna Engineering. 12.5 Summary. References. CHAPTER 13: FSS-BASED EBG SURFACES (Stefano Maci and Alessio Cucini). 13.1 Introduction. 13.2 MoM Solution. 13.3 Accessible Mode Admittance Network. 13.4 Pole-Zero Matching Method for Dispersion Analysis. 13.5 Conclusions. Acknowledgments. References. CHAPTER 14: SPACE-FILLING CURVE HIGH-IMPEDANCE GROUND PLANES (John McVay, Nader Engheta, and Ahmad Hoorfar). 14.1 Resonances of Space-Filling Curve Elements. 14.2 High-Impedance Surfaces Made of Space-Filling Curve Inclusions. 14.3 Use of Space-Filling Curve High-Impedance Surfaces in Antenna Applications. 14.4 Space-Filling Curve Elements as Inclusions in DNG Bulk Media. 14.5 Conclusions. References. Index.
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Journal ArticleDOI
21 Oct 2011-Science
TL;DR: In this article, a two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint phase discontinuities on propagating light as it traverses the interface between two media.
Abstract: Conventional optical components rely on gradual phase shifts accumulated during light propagation to shape light beams. New degrees of freedom are attained by introducing abrupt phase changes over the scale of the wavelength. A two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint such phase discontinuities on propagating light as it traverses the interface between two media. Anomalous reflection and refraction phenomena are observed in this regime in optically thin arrays of metallic antennas on silicon with a linear phase variation along the interface, which are in excellent agreement with generalized laws derived from Fermat’s principle. Phase discontinuities provide great flexibility in the design of light beams, as illustrated by the generation of optical vortices through use of planar designer metallic interfaces.

6,763 citations

Journal ArticleDOI
TL;DR: This Review focuses on recent developments on flat, ultrathin optical components dubbed 'metasurfaces' that produce abrupt changes over the scale of the free-space wavelength in the phase, amplitude and/or polarization of a light beam.
Abstract: Metamaterials are artificially fabricated materials that allow for the control of light and acoustic waves in a manner that is not possible in nature. This Review covers the recent developments in the study of so-called metasurfaces, which offer the possibility of controlling light with ultrathin, planar optical components. Conventional optical components such as lenses, waveplates and holograms rely on light propagation over distances much larger than the wavelength to shape wavefronts. In this way substantial changes of the amplitude, phase or polarization of light waves are gradually accumulated along the optical path. This Review focuses on recent developments on flat, ultrathin optical components dubbed 'metasurfaces' that produce abrupt changes over the scale of the free-space wavelength in the phase, amplitude and/or polarization of a light beam. Metasurfaces are generally created by assembling arrays of miniature, anisotropic light scatterers (that is, resonators such as optical antennas). The spacing between antennas and their dimensions are much smaller than the wavelength. As a result the metasurfaces, on account of Huygens principle, are able to mould optical wavefronts into arbitrary shapes with subwavelength resolution by introducing spatial variations in the optical response of the light scatterers. Such gradient metasurfaces go beyond the well-established technology of frequency selective surfaces made of periodic structures and are extending to new spectral regions the functionalities of conventional microwave and millimetre-wave transmit-arrays and reflect-arrays. Metasurfaces can also be created by using ultrathin films of materials with large optical losses. By using the controllable abrupt phase shifts associated with reflection or transmission of light waves at the interface between lossy materials, such metasurfaces operate like optically thin cavities that strongly modify the light spectrum. Technology opportunities in various spectral regions and their potential advantages in replacing existing optical components are discussed.

4,613 citations

Journal ArticleDOI
TL;DR: Recent progress in the physics of metasurfaces operating at wavelengths ranging from microwave to visible is reviewed, with opinions of opportunities and challenges in this rapidly developing research field.
Abstract: Metamaterials are composed of periodic subwavelength metal/dielectric structures that resonantly couple to the electric and/or magnetic components of the incident electromagnetic fields, exhibiting properties that are not found in nature. This class of micro- and nano-structured artificial media have attracted great interest during the past 15 years and yielded ground-breaking electromagnetic and photonic phenomena. However, the high losses and strong dispersion associated with the resonant responses and the use of metallic structures, as well as the difficulty in fabricating the micro- and nanoscale 3D structures, have hindered practical applications of metamaterials. Planar metamaterials with subwavelength thickness, or metasurfaces, consisting of single-layer or few-layer stacks of planar structures, can be readily fabricated using lithography and nanoprinting methods, and the ultrathin thickness in the wave propagation direction can greatly suppress the undesirable losses. Metasurfaces enable a spatially varying optical response (e.g. scattering amplitude, phase, and polarization), mold optical wavefronts into shapes that can be designed at will, and facilitate the integration of functional materials to accomplish active control and greatly enhanced nonlinear response. This paper reviews recent progress in the physics of metasurfaces operating at wavelengths ranging from microwave to visible. We provide an overview of key metasurface concepts such as anomalous reflection and refraction, and introduce metasurfaces based on the Pancharatnam-Berry phase and Huygens' metasurfaces, as well as their use in wavefront shaping and beam forming applications, followed by a discussion of polarization conversion in few-layer metasurfaces and their related properties. An overview of dielectric metasurfaces reveals their ability to realize unique functionalities coupled with Mie resonances and their low ohmic losses. We also describe metasurfaces for wave guidance and radiation control, as well as active and nonlinear metasurfaces. Finally, we conclude by providing our opinions of opportunities and challenges in this rapidly developing research field.

1,528 citations


Cites background from "Metamaterials: Physics and Engineer..."

  • ...This class of micro- and nano-structured artificial media have attracted great interest during the past 15 years and yielded ground-breaking electromagnetic and photonic phenomena [4, 5]....

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Journal ArticleDOI
TL;DR: This review presents a comprehensive overview of the flourishing field of Au nanorods in the past five years, focusing mainly on the approaches for the growth, shape and size tuning, functionalization, and assembly of Au Nanorods, as well as the methods for the preparation of their hybrid structures.
Abstract: Gold nanorods have been receiving extensive attention owing to their extremely attractive applications in biomedical technologies, plasmon-enhanced spectroscopies, and optical and optoelectronic devices. The growth methods and plasmonic properties of Au nanorods have therefore been intensively studied. In this review, we present a comprehensive overview of the flourishing field of Au nanorods in the past five years. We will focus mainly on the approaches for the growth, shape and size tuning, functionalization, and assembly of Au nanorods, as well as the methods for the preparation of their hybrid structures. The plasmonic properties and the associated applications of Au nanorods will also be discussed in detail.

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Journal ArticleDOI
21 Sep 2007-Science
TL;DR: It is shown that the concept of metamaterial-inspired nanoelectronics (“metactronics”) can bring the tools and mathematical machinery of the circuit theory into optics, may link the fields of optics, electronics, plasmonics, and meetamaterials, and may provide road maps to future innovations in nanoscale optical devices, components, and more intricate nanoscales metammaterials.
Abstract: A form of optical circuitry is overviewed in which a tapestry of subwavelength nanometer-scale metamaterial structures and nanoparticles may provide a mechanism for tailoring, patterning, and manipulating local optical electric fields and electric displacement vectors in a subwavelength domain, leading to the possibility of optical information processing at the nanometer scale. By exploiting the optical properties of metamaterials, these nanoparticles may play the role of "lumped" nanocircuit elements such as nanoinductors, nanocapacitors, and nanoresistors, analogous to microelectronics. I show that this concept of metamaterial-inspired nanoelectronics ("metactronics") can bring the tools and mathematical machinery of the circuit theory into optics, may link the fields of optics, electronics, plasmonics, and metamaterials, and may provide road maps to future innovations in nanoscale optical devices, components, and more intricate nanoscale metamaterials.

1,161 citations