Magnetic and electromagnetic properties of metamaterials based on the application of optical transform theory

　　Title: Magnetic and electromagnetic properties of metamaterials based on the application of optical transform theory
　　Author: Lv Jian-hong
　　Degree-granting units: Huazhong University of Science and Technology
　　Key words: electromagnetic metamaterials;; electromagnetic response;; negative refractive index;; negative permittivity;; negative permeability;; optical transformation;; beam deflector;; invisibility cloak
　　Abstract:
　　Electromagnetic metamaterials as an emerging, interdisciplinary field, with potential prospects and therefore received extensive attention over the past decade. This paper from the study of electromagnetic metamaterials for electromagnetic waves incident response starting structural design of the new single left-handed materials, and can reduce dependence on the polarization of electromagnetic waves of high-dimensional quad flat C-shape left-handed materials; http://www.999magnet.com/ Research different number of openings between the single ring ring resonator coupling as a result of coupling the magnetic splitting; In addition, we also change based on optical theory, electromagnetic metamaterials studied electromagnetic field distribution in the control of the application (such as beam deflectors, invisibility cloak).
　　The first part of this paper is to study the construction of new electromagnetic metamaterials, electromagnetic waves and their role in the incident electromagnetic response. First, our detailed analysis of the long thin metal (Rods) (or metal short-term), and the open ring resonator (SRRs) at different relative arrangement of cases, the negative refraction of electromagnetic properties of left-handed materials, through simulations verify that, when the metal short-term harmony Zhen-Huan coplanar and symmetrical to each other when connected, you can also have a wide passband, low-loss benefits. Second, we designed a single, simple structure, easy processing of double L-shaped left-handed materials, and its theoretical and experimental verification of negative refraction were the two results agree, confirmed the correctness of the design; also detailed analysis of its mechanism of negative refraction, and magnetic resonance patterns of two different causes. Then, we designed a high-dimensional four-fold C-shaped plane electromagnetic left-handed materials, metamaterials in the design reduces the polarization of the incident electromagnetic wave dependence, with the incidence in different directions, different polarization of electromagnetic waves are negative refractive index properties; the same time, the case incident in different directions, the electromagnetic response of metamaterials and negative refraction of the mechanism of the detailed analysis and verification. Finally, we have the same Magnetic lifter polarization, different opening number (1 - open, 2 - open and 4 - open) single-loop ring resonator electromagnetic response characteristics of a detailed study, found that single-loop ring resonator with an increase in the number of openings , between adjacent ring resonator to enhance the electromagnetic coupling, 4 - open mode when the magnetic resonance will lead to a split, forming two different causes of magnetic resonance mode; In addition, through adjustment 4 - open ring resonator geometry, we constructed with ultra-wide band of negative magnetic single negative magnetic metamaterials.
　　The second part of this paper is mainly based on optical transform theory to study the electromagnetic metamaterials electromagnetic field distribution in the control of the application. First, we designed a finite embedded coordinate transformation based on the multi-branch beam deflector, the incident electromagnetic waves in different directions simultaneously, no reflection at different angles of deflection; also two branches of study design, in case of cross-beam deflector, Although there is a coupling between branches and make a slight deformation of the waveform, but can still make the incident wave without reflection predetermined angle of deflection. Secondly, we also studied the combination of stealth on cloak, invisibility cloak irregular boundary impedance matching problems, through the rational design of electromagnetic invisibility cloak parameters, greatly reducing the cloak of the incident electromagnetic wave scattering, and its stealth effect is simulated verification.
　　Degree Year: 2010