摘要:超材料是人工設計的復合材料，是存在于自然界中特殊的材料。負折射率材料（NIMS），通常在一個常見的頻率波段呈現出的介電常數和磁導率μ是負的，這是超材料重要的特征之一。它具有與一般材料大為不同的傳播性質：超常的透射，反射，折射和吸收現象等。超材料這種增強效應在亞波長光學、光電集成器件等方面的應用，以及其潛在的豐富的物理機制，使其已成為當前研究領域的熱點之一。

　　 本文采用鏤空模板法——一種新型制備工藝，即先制作帶有鏤空圖形的SU-8膜，然后將金屬薄膜沉積在SU-8膜上，獲得具有特定波長透過率異常增強的表面三明治結構的超材料。并利用高頻結構仿真軟件HFSS對實驗中用到超材料結構進行了仿真，分析了不同孔徑以及不同介質層對負折射超材料透射行為的影響。之后研究了有效介質模型下的低頻透射帶的電磁響應來測定透射的有效參數，驗證了負折射率對應的低頻率電磁波共振的透射峰，以及夾層的吸收對透射率的影響，得到了電磁共振模式下夾層吸收的介電損耗，將會導致了透光率的減少的結果。

關鍵詞：三明治結構；超材料；周期孔陣金屬薄膜；負折射

Abstract：Metamaterials are artificial design of composite materials ,which is a special materials negative refractive index materials (NIMS) that exist in nature. NIMS always show a dielectric constantand magnetic permeability μ in a common frequency band. And this is one of the important features of negative material. It has a very different nature of the spread of general materials: the extraordinary transmission, reflection, refraction, absorption phenomena and so on. The enhanced effect of metamaterials in subwavelength optics, optoelectronic integrated device, as well as its potential wealth of physical mechanism have made it become one of the hot area of ??research.

     In this paper, the hollow template method - a new preparation process, namely, the first production of SU-8 layer with hollow graphics, and then the metal film was deposited in the SU-8 membrane.And then we can acquire a specific wavelength enhanced transmission surface sandwich metamaterial structure. We simulate the metameterials used in our experirment by high frequency structure simulation software HFSS, and analyse the transmission changes of different pore sizes and different dielectric layer on the negative refraction metamaterials. Besides, we study the electromagnetic response of the effective medium model to determine the effective parameters of the transmission in low-frequency transmission band ,and  verify that the transmission peaks of negative refractive index corresponding to the low-frequency electromagnetic resonance, as well as dissection of the electromagnetic resonancethe loss of the interlayer dielectric absorption mode.At last,all of this will lead to the reduction of light transmittance.

Key words: Sandwich structure; metamaterials; periodic hole array metal thin film; negative refraction