By Nader Engheta, Richard W Ziolkowski
Leading specialists discover the unique homes and interesting functions of electromagnetic metamaterials
Metamaterials: Physics and Engineering Explorations provides readers a essentially written, richly illustrated creation to the latest learn advancements within the zone of electromagnetic metamaterials. It explores the basic physics, the designs, and the engineering elements, and issues to a myriad of fascinating strength purposes. The editors, stated leaders within the box of metamaterials, have invited a gaggle of best researchers to give either their very own findings and the total array of state of the art functions for antennas, waveguides, units, and components.
Following a short assessment of the historical past of man-made fabrics, the e-book divides its assurance into significant periods of metamaterials. the 1st 1/2 the ebook examines potent media with unmarried (SNG) and double adverse (DNG) houses; the second one part examines electromagnetic band hole (EBG) constructions. The ebook additional divides each one of those sessions into their three-d (3D volumetric) and two-dimensional (2D planar or floor) realizations. Examples of every kind of metamaterial are awarded, and their identified and expected houses are reviewed.
Collectively, Metamaterials: Physics and Engineering Explorations provides a assessment of contemporary examine advances linked to a hugely various set of electromagnetic metamaterials. Its multifaceted process bargains readers a mix of theoretical, numerical, and experimental views for a greater realizing in their behaviors and their potentialapplications in elements, units, and structures. vast reference lists supply possibilities to discover person subject matters and periods of metamaterials in better depth.
With full-color illustrations all through to elucidate options and support visualize genuine effects, this e-book offers a dynamic, effortless source for college kids, engineers, physicists, and different researchers within the components of electromagnetic fabrics, microwaves, millimeter waves, and optics. It equips rookies with a easy figuring out of metamaterials and their capability functions. complex researchers will reap the benefits of thought-provoking views that would deepen their wisdom and cause them to new components of investigation.
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Extra info for METAMATERIALS Physics and Engineering Explorations
7) µ √ 1/2 µ = µr µ0 − j µ ≈ −j |µr µ0 | + j 2|µr µ0 |1/2 accounting for the branch-cut choices. 8) √ µ ε |µr |1/2 1 µ − 1+j η = √ ≈ η0 |εr |1/2 2 |µr |µ0 |εr |ε0 ε √ where the speed of light c = 1/ ε0 µ0 and the free-space wave impedance η0 = √ µ0 /ε0 . 9) 10 CHAPTER 1 INTRODUCTION, HISTORY, AND SELECTED TOPICS has a negative real part. Its imaginary part is also negative corresponding to the passive nature of the DNG medium. , [6,19–24]), subwavelength waveguides with lateral dimension below diffraction limits [25–30], ˇ enhanced focusing (see [7, 31]), backward-wave antennas , Cerenkov radiation , photon tunneling [34,35], and enhanced electrically small antennas .
If, in addition, the incident wave is evanescent, that is, when the transverse component of the wave vector of the incident wave is greater than the wavenumber of the medium (kt2 > ω2 µ1 ε1 and kt2 > ω2 µ2 ε2 ), the transverse wave impedance in each medium (with a no-loss assumption) becomes purely imaginary, that is, η1,transverse = j X1,transverse and η2,transverse = j X2,transverse , and the longitudinal component of the wave vector in each medium also becomes purely imaginary, that is, k1,longitudinal = j α1 and k2,longitudinal = j α2 [45,46].
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