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Metamaterials and Its’ Numerical Calculations

Author: WangMinFeng
Tutor: ZhouLuWei
School: Fudan University
Course: Condensed Matter Physics
Keywords: Negative refraction Finite Element Method Multi-physics coupling software Self-assembly Fractal
CLC: TB34
Type: Master's thesis
Year: 2010
Downloads: 113
Quote: 0
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Abstract


Negative refractive index materials (Metamaterial) because of its unique electromagnetic properties caused widespread concern and research. Does not exist naturally in nature has a negative refractive index materials, decades ago, scientists proposed the concept of negative refraction , but until 2000 , Smith Professor of the University of California , San Diego research team produced the world's first negative refractive index Metamaterial samples and experiments proved negative refraction and negative refraction , in Science magazine published the first Metamaterial papers , since then every year a large number of scientific workers put on this field of exploration . Negative refractive index materials are usually prepared by the methods of lithography metal method, photonic crystals law and self-assembly method . With respect to the photonic crystal method, a photolithography process metallization demanding because of the poor optical properties and metal , more difficult to construct the experiment . Lithography in the visible region of metallic materials to achieve specific properties ( mainly a negative refractive index ) is particularly difficult . Self-assembly method is mainly applied self-assembly properties of colloidal particles to form a specific structure ( fractal structure ) to achieve negative refraction . The main tasks: First, based on the finite element method , the use of multi-physics coupling software on a composite structure - metal - dielectric - metal to make a computer simulation , confirmed that the structure of the material does have a negative refractive index , and to study the transmission coefficient of the incident wave frequency. Verified at the theoretical level , two artificial construct of negative refractive index materials exhibit electromagnetic properties , and further experiments designed to construct a new , easy to implement , specific material provides good stability theoretical basis ; Second is the self- assembled to form the physical characteristics of fractal structure for research and further exploration.

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