Optical Properties of Three Dimensioanl Split-Ring-Resonators Metamaterials( II )

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Project title

Code/計畫編號

MOST105-2112-M492-001

Translated Name/計畫中文名

三維裂環共振器超穎材料之光學特性研究( II )

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

陳哲勤(計畫主持人)

Department/Unit

Taiwan Instrument Research Institute, TIRI

Website

https://www.grb.gov.tw/search/planDetail?id=11889009

Year

2016

Start date/計畫起

01-08-2016

Expected Completion/計畫迄

31-07-2017

Co-Investigator(s)

Hai-Pang Chiang

Bugetid/研究經費

847千元

ResearchField/研究領域

物理

"本計畫為先前提出之兩年期研究計畫的第二年度研究課題，主要內容為利用金屬應力自組法，製作各類三維超穎材料，並透過光譜量測及數值模擬分析，研究電磁波與元件交互作用所顯現之光學特性。第二年度計畫包含二個研究主題，且在第一年期已部分完成預訂研究項目: 1. 三維化雙間隙裂環共振器雙間隙金屬裂環共振器的提出，在於解決提高共振頻率瓶頸。由裂環共振器的類LC 模型可知，單位位元愈小，LC 共振頻率愈大，但由於非理想金屬的歐姆損失，將導致裂環共振器的共振頻率最後會趨近於一常數，雙間隙裂環共振器可有效降低該單位位元之電容值進而提高其共振頻率。另一方面，本研究之製程，可隨意控制雙間隙的大小及其對稱程度，故本主題將主要探討裂環雙間隙與入射電磁波的交互作用所產生的相關共振現象及電磁響應。 2. 超環面超穎材料由四個裂環共振器之磁響應顯現的磁偶極矩形成的封閉迴路所構成的超環響應近來已在實驗上被驗證，且具有高品質因子的特性，然而該響應的發生及特性取決於裂環共振器之相對位置及共振器間之耦合，而此立體結構可由本研究之製作方法簡單地製作出來，包含共振器位置、大小及數量等。有鑒於此，本主題將透過實驗及數值模擬深入探討由本研究之裂環共振器所組成的超環面超穎材料位元及其超環響應。 " "This project is the second-year research topics based on previously planned two-years research project. The study will focus on the electromagnetic properties of the optical three dimensional split ring resonators (SRRs) and the derivative metamaterials fabricated by metal-stress-driven assembly method will be investigated by both spectrum experiments and numerical simulations. There two research topics in this second-year project and are partially achieved at present: 1. 3D double-slit SRRs The double-slit SRRs were proposed to increase the resonant frequency. Based on the LC-like model of SRRs, the LC resonance frequency increases with decreasing SRR size. However, the ohmic loss in real metals leads to the resonant frequency saturated and approached to a constant. The double-slit SRRs possess lower capacitances comparing with single-slit SRRs and result in higher resonant frequencies. In this fabrication method, the slit widths and symmetry could be arbitrarily controlled. Therefore, we will focus on the resonance modes and electromagnetic responses of the interactions between gaps and incident light. 2. Toroidal metamaterials The toroidal dipole response recently was experimentally verified by four magnetic dipoles of SRRs with head-to-tail close loop configuration and showed high quality factor. The toroidal response is highly dependent on the position and coupling of SRRs. The 3D structure, including the positions, size, and quantity of SRRs, of a toroid could be simply assembled by our fabrication process. In this topic, we will further investigate the toroidal response of the toroidal metamaterial constructed by the 3D SRRs."

Keyword(s)

超穎材料
裂環共振器
折射係數
磁導率
Metamaterials
Split Ring Resonators
Index of refraction
Permeability

DSpace CRIS

Optical Properties of Three Dimensioanl Split-Ring-Resonators Metamaterials( II )

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