Optical Properties of Three Dimensioanl Split-Ring-Resonators Metamaterials

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簡歷

基本資料

Project title

Code/計畫編號

MOST104-2112-M492-004

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

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=11570601

Year

2015

Start date/計畫起

01-08-2015

Expected Completion/計畫迄

31-07-2016

Co-Investigator(s)

Hai-Pang Chiang

Bugetid/研究經費

941千元

ResearchField/研究領域

物理
光電工程

"本計畫為兩年期研究計畫，主要內容為利用金屬應力自組法，製作各類三維光學共振器元件，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。整個計畫包含三個研究主題: 1. 三維化單間隙裂環共振器裂環共振器與入射電磁波交互作用而產生的磁響應是該元件最令人感興趣的物理現象，本研究發展出之三維化結構可使入射電磁波之磁場分量輕易的與元件耦合而顯現磁響應，透過設計適當元件尺寸可決定其顯現之特殊光學性質，並已建立可信的模擬模型，第一、本技術可隨意控制間隙位置，故可探討間隙位置與光耦合的相關特性；另外，透過位元陣列化設計，更可進一步深入探討單位位元間的電磁耦合效應；最後，因元件為懸浮結構，故我們將探討其形貌對於環境參數的變化，評估其應用面向。 2. 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，而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。 3. 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。 " "In this two-year project, 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 are three research topics in this project: Ⅰ. 3D single-slit SRRs The magnetic response (LC resonance) of SRRs resulted from the interactions with electromagnetic field is the most interesting physical phenomena for researchers. The three 3D SRRs can easily couple with the magnetic field of incident light creating optical magnetism. Through tailoring shape and size, the specific optical characteristics can be expected and we have built a reliable simulation model. In this topic, we will, first of all, find out the interactions between slit with arbitrary position and incident light since the slit position could be changed arbitrarily by this technique. Secondly, by varying the array designs, the coupling between unit cells could be discussed as well. Finally, because of the free standing structure of our design, we could then discuss the shape geometries versus environments parameters to evaluate the relative applications. Ⅱ. 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. Ⅲ. 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
Split Ring Resonators
Metamaterials

DSpace CRIS

Optical Properties of Three Dimensioanl Split-Ring-Resonators Metamaterials

基本資料

Description