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題 名 | My Optical Twin |
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作 者 | 張芷維; 陳勁宇; | 書刊名 | 光學工程 |
卷 期 | 95 民95.09 |
頁 次 | 頁46-65 |
專 輯 | 奈米光子 |
分類號 | 440.34 |
關鍵詞 | 超穎材料; 完美透鏡理論; 左手材料; |
語 文 | 英文(English) |
中文摘要 | 本文介紹“超穎材料(metamaterial)”的概念並針對其中一個廣為人知的分枝-“左手材料(left-handed material)”-深入其超自然的性質及這些特殊性質背後的物理機制和意涵。過去幾年來,許多能使材料具有左手性質的人造結構被提出,這些結構能夠滿足左手材料定義的負介電係數(permittivity)和負磁導率(permeability),本文對於現今廣泛運用的SRR結構做介紹。在左手材料演進的過程中,不斷縮小結構的尺度以配合可見光範圍的共振頻率是最主要的研究方向,除了對於原始SRR結構的改進和變形之外,亦有運用不同工作原理的新模型被提出。最後,在可見光波段的理想左手材料基礎之上,發展出了打破光學繞射極限的,“完美透鏡”(perfect lens)理論,這將是左手材料極為重要的應用之一。 |
英文摘要 | In this article, we introduce the basic concept of metamaterials and discuss in detail one of its most famous field-left-handed material (LHM). We explain briefly the mechanism behind LHM’s characteristic feature, i.e.negative permittivity (ε) and permeability (μ). To realize the LHM, many man-made structures were proposed in the past few years. Here, we focus on one of the most widely used structures-an array of metallic wires together with split ring resonators (SRRs). In order to make an LHM small enough to fit the frequency of visible light, there are not only improved SRR structures but also a few brand new structures that have been proposed. Once a LHM matching the visible frequency region is fabricated, it is then possible to make a “perfect lens”, which points toward one of the most important applications of LHM. |
本系統中英文摘要資訊取自各篇刊載內容。