Study On SQUID Left-handed Material And Anisotropic Left-handed Material

Since the left-handed materials (LHM) having both negative permeability and negative permittivity were first realized by Smith in 2000, this area has aroused strong concern. The LHM is a new kind of artificial materials, which has some new physical effects and peculiar properties. Therefore, studying how to construct LHM and about the properties of the LHM, is of great significance both in theory and application.The central aim of the thesis is the investigation of design the SQUID LHM and studying anisotropic materials with specific permittivity and permittivity. It focuses on the following areas:First, a new design of LHM based on SQUIDs and metal wires is proposed. And the quantum properties induced by a microwave probe field and a microwave coupling field in the LHM is systematicly studied, mainly focusing on controlling the permeability through the coupling field because of quantum coherence effects .Second, the response on the weak signal microwave probe field of the SQUID array working in another way– under DC bias magnetic field is studied. We find that the permeability and the resonance frequency can be adjusted by the DC bias magnetic field, and the bistable characteristic arises under certain conditions. This makes achieving negative permeability under extremely low frequency as well as the permeability switching between positive and negative value rapidly through a magnetic field pulse into possible.And then, we analyse the surface plasmon polaritons (SPPs) on the surface between two semi-infinite LHM having dispersion. Then we discuss the new features of the SPPs on the anisotropic LHM, and explore the possibility of inhibiting the decay. We also propose a"amplification of the decay wave"mode and discuss the possibility of the experimental examination for such a mode.Finally, the concept of the negative reflection (that is, the incident and reflected light lie on the same side of the normal) is proposed based on studying the negative reflection phenomenon on the inner surface of the uniaxial crystal. Conditions for achieving negative reflection in common uniaxial crystals is discussed too. After analysing the behavior of the electromagnetic waves in anisotropic materials, the simple relationship between the incident and the reflected angle of the wave vector and the incidence and the reflection angel of the ray is constructed. Also the reflection and transmission coefficients of the electromagnetic field at the interface is got. Our analysis found that for LHM having negativeε⊥and positiveεzor positiveε⊥and negativeεz , by choosing a suitable axis angle, its reflection and refraction behaves will be even more "strange".