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A terahertz metamaterial with unnaturally high refractive index

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  • Muhan Choi

    (Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-751, South Korea
    Present address: Convergence Components and Materials Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, South Korea.)

  • Seung Hoon Lee

    (Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-751, South Korea)

  • Yushin Kim

    (Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-751, South Korea)

  • Seung Beom Kang

    (Convergence Components and Materials Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, South Korea)

  • Jonghwa Shin

    (Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-751, South Korea)

  • Min Hwan Kwak

    (Convergence Components and Materials Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, South Korea)

  • Kwang-Young Kang

    (Convergence Components and Materials Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, South Korea)

  • Yong-Hee Lee

    (Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-751, South Korea)

  • Namkyoo Park

    (School of Electrical Engineering and Computer Science, Seoul National University)

  • Bumki Min

    (Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-751, South Korea)

Abstract

Refractive index of 30-plus in new metamaterial Metamaterials, artificially designed composites with electromagnetic properties unobtainable in the natural world, are providing new opportunities for fundamental research as well as for useful applications. So far, the search for materials with a negative refractive index has been a priority, but to extend the scope for novel 'transformation optics' applications, materials with an unnaturally high refractive index would be similarly useful. Bumki Min and colleagues have now produced a broadband, flexible terahertz metamaterial with an unprecedentedly high refractive index of 38.6. Based on layered arrays of I-shaped thin gold building blocks, the new metamaterial provides a starting point for work on small-footprint cloaking devices, wide-angle lenses and slow-light devices.

Suggested Citation

  • Muhan Choi & Seung Hoon Lee & Yushin Kim & Seung Beom Kang & Jonghwa Shin & Min Hwan Kwak & Kwang-Young Kang & Yong-Hee Lee & Namkyoo Park & Bumki Min, 2011. "A terahertz metamaterial with unnaturally high refractive index," Nature, Nature, vol. 470(7334), pages 369-373, February.
    • Handle: RePEc:nat:nature:v:470:y:2011:i:7334:d:10.1038_nature09776
    DOI: 10.1038/nature09776
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    Cited by:

    1. Ning Qu & Hanxu Sun & Yuyao Sun & Mukun He & Ruizhe Xing & Junwei Gu & Jie Kong, 2024. "2D/2D coupled MOF/Fe composite metamaterials enable robust ultra–broadband microwave absorption," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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