Space-coiling metamaterials with double negativity and conical dispersion

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Zixian Liang
  • Tianhua Feng
  • Shukin Lok
  • Fu Liu
  • Kung Bo Ng
  • Jinjin Wang
  • Seunghoon Han
  • Sangyoon Lee
  • Jensen Li

Detail(s)

Original languageEnglish
Article number1614
Journal / PublicationScientific Reports
Volume3
Publication statusPublished - 8 Apr 2013

Link(s)

Abstract

Metamaterials are effectively homogeneous materials that display extraordinary dispersion. Negative index metamaterials, zero index metamaterials and extremely anisotropic metamaterials are just a few examples. Instead of using locally resonating elements that may cause undesirable absorption, there are huge efforts to seek alternative routes to obtain these unusual properties. Here, we demonstrate an alternative approach for constructing metamaterials with extreme dispersion by simply coiling up space with curled channels. Such a geometric approach also has an advantage that the ratio between the wavelength and the lattice constant in achieving a negative or zero index can be changed in principle. It allows us to construct for the first time an acoustic metamaterial with conical dispersion, leading to a clear demonstration of negative refraction from an acoustic metamaterial with airborne sound. We also design and realize a double-negative metamaterial for microwaves under the same principle.

Research Area(s)

Citation Format(s)

Space-coiling metamaterials with double negativity and conical dispersion. / Liang, Zixian; Feng, Tianhua; Lok, Shukin; Liu, Fu; Ng, Kung Bo; Chan, Chi Hou; Wang, Jinjin; Han, Seunghoon; Lee, Sangyoon; Li, Jensen.

In: Scientific Reports, Vol. 3, 1614, 08.04.2013.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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