Experimental Study on Several Left-Handed Matamaterials

Abstract

Left-handed materials (LHM) are engineered structures that exhibit electromagnetic properties not found in nature. Real applications of LHM need substrates with low loss, wide bandwidth as well as stable mechanical characteristics. In this paper, we summarize some experimental as well as numerical results of lefthanded materials with different configurations of rods and splitring resonators (SRRs). Hot-press technics utilized in PC board manufacture are used to produce solid-state multi-layer left-handed materials. Either mechanical or electromagnetic characteristics of LH samples are notably improved.

Experimental Measurement Method to Determine the Permittivity of Extra Thin Materials Using Resonant Metamaterials

“…The electromagnetic properties of resonant metamaterials are sensitive to the shape of structures, the dimensions of the unit cell, and the materials parameters of metal and the surrounding medium. Among resonant metamaterial structures, the resonant frequency of symmetric SRR [27,28] is very sensitive to the real part of permittivity of the substrate, and the qualify factor depends on the loss of substrate in microwave band. The gap between two SRRs can be equivalent to a capacitance, and the gap of each SRR can also be treated as a capacitance.…”

“…The resonant metamaterial used in the method is symmetric split-ring resonators (SRR) [27,28]. The resonant frequency of symmetric SRR is sensitive to the real part of permittivity of the substrate, and the quality factor depends on the image part of permittivity of the substrate.…”

Photonic Transmission Spectra in One-Dimensional Fibonacci Multilayer Structures Containing Single-Negative Metamaterials

“…They are also called the double-negative (DNG) materials or lefthanded materials because the electric field, the magnetic field and the wave vector of an EM wave propagating in such a medium form a left-handed triplet [1][2][3][4][5][6][7]. In addition to the DNG materials, another metamaterial called the single-negative (SNG) material in which only one of the material parameters is negative deserve special attention.…”

Lateral Displacement of an Electromagnetic Beam Reflected From a Grounded Indefinite Uniaxial Slab

“…In order to get a large or negative lateral shift, many attempts have been made with various materials and configurations, such as dielectric slabs [14][15][16][17], metal surfaces [18][19][20], dielectricchiral surface [21], multilayered structures [22], metallic gratings [23], and photonic crystals [24]. Recently, left-handed metamaterial with negative permeability and permittivity has attracted a lot of attention due to their extraordinary electromagnetic characteristics [25][26][27][28][29][30][31][32], and negative lateral shift has been observed in left-handed materials [33][34][35][36][37]. In those works, the case for the isotropic left-handed material has been analyzed extensively.…”