Multiband negative index metamaterials at optical frequencies

作者：Tang Shi-Wei; Zhu Wei-Ren; Zhao Xiao-Peng^*

来源：Acta Physica Sinica, 2009, 58(5): 3220-3223.

• negative refraction
• multi-band
• fishnet structure

Based on the fishnet negative index metamaterials (NlMs) of circular-shaped holes operating at optical frequencies, the influence of modifying the hole shape is studied using the commercial software package CST Microwave studio. Numerical simulations show that, even a tiny modification may lead to broadening of the negative refractive hand. So we designed two fishnet NIMs of the gradient holes and half-global holes. Compared with the fishnet NlMs of circular-shaped holes,these two structures can realize negative refraction at multi-frequency bands,and the resonance frequencies exhibit an obvious red-shift. We present a chemical technique for preparing the fishnet NlMs of half-global holes, which is a simple and feasible way to realize multiband negative index metamaterials at optical frequencies.

• 出版日期2009-5
• 单位西北工业大学