Broadband electromagnetic cloaking with smart metamaterials

Dongheok Shin, Yaroslav Urzhumov, Youngjean Jung, Gumin Kang, Seunghwa Baek, Minjung Choi, Haesung Park, Kyoungsik Kim, David R. Smith

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

The ability to render objects invisible with a cloak that fits all objects and sizes is a long-standing goal for optical devices. Invisibility devices demonstrated so far typically comprise a rigid structure wrapped around an object to which it is fitted. Here we demonstrate smart metamaterial cloaking, wherein the metamaterial device not only transforms electromagnetic fields to make an object invisible, but also acquires its properties automatically from its own elastic deformation. The demonstrated device is a ground-plane microwave cloak composed of an elastic metamaterial with a broad operational band (10-12 GHz) and nearly lossless electromagnetic properties. The metamaterial is uniform, or perfectly periodic, in its undeformed state and acquires the necessary gradient-index profile, mimicking a quasi-conformal transformation, naturally from a boundary load. This easy-to-fabricate hybrid elasto-electromagnetic metamaterial opens the door to implementations of a variety of transformation optics devices based on quasi-conformal maps.

Original languageEnglish
Article number1213
JournalNature communications
Volume3
DOIs
Publication statusPublished - 2012 Dec 14

Fingerprint

Electromagnetic Phenomena
Metamaterials
electromagnetism
broadband
Equipment and Supplies
Optical Devices
Electromagnetic Fields
Rigid structures
Microwaves
conformal mapping
electromagnetic properties
elastic deformation
Elastic deformation
rigid structures
Optical devices
visibility
Electromagnetic fields
Optics
electromagnetic fields
optics

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Shin, D., Urzhumov, Y., Jung, Y., Kang, G., Baek, S., Choi, M., ... Smith, D. R. (2012). Broadband electromagnetic cloaking with smart metamaterials. Nature communications, 3, [1213]. https://doi.org/10.1038/ncomms2219
Shin, Dongheok ; Urzhumov, Yaroslav ; Jung, Youngjean ; Kang, Gumin ; Baek, Seunghwa ; Choi, Minjung ; Park, Haesung ; Kim, Kyoungsik ; Smith, David R. / Broadband electromagnetic cloaking with smart metamaterials. In: Nature communications. 2012 ; Vol. 3.
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Shin, D, Urzhumov, Y, Jung, Y, Kang, G, Baek, S, Choi, M, Park, H, Kim, K & Smith, DR 2012, 'Broadband electromagnetic cloaking with smart metamaterials', Nature communications, vol. 3, 1213. https://doi.org/10.1038/ncomms2219

Broadband electromagnetic cloaking with smart metamaterials. / Shin, Dongheok; Urzhumov, Yaroslav; Jung, Youngjean; Kang, Gumin; Baek, Seunghwa; Choi, Minjung; Park, Haesung; Kim, Kyoungsik; Smith, David R.

In: Nature communications, Vol. 3, 1213, 14.12.2012.

Research output: Contribution to journalArticle

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Shin D, Urzhumov Y, Jung Y, Kang G, Baek S, Choi M et al. Broadband electromagnetic cloaking with smart metamaterials. Nature communications. 2012 Dec 14;3. 1213. https://doi.org/10.1038/ncomms2219