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Materials science: One size cloaks all

Date:
November 23, 2012
Source:
ResearchSEA
Summary:
Scientists have developed a metamaterial invisibility cloak that can adapt to hide different sized objects. The findings represent a useful advance for more practical applications of metamaterial cloaking.

A metamaterial invisibility cloak that can adapt to hide different sized objects is demonstrated by in Nature Communications this week. The findings represent a useful advance for more practical applications of metamaterial cloaking.

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The research is led by Yonsei University, Korea.

Metamaterials have already been shown to hide objects from electromagnetic waves by manipulating the light so that it appears to have not interacted with anything. However, these cloaks need to be redesigned and rebuilt if the shape of the object changes. Kyoungsik Kim and colleagues now present a smart metamaterial that is able to adapt to changes in the object shape, so that a range of objects may be hidden by one cloak. The cloak is based on elastic materials, which enable it to deform around the object. At the same, the deformation alters its properties to maintain invisibility.

The team build and demonstrate cloaks for objects whose height varies over around 10mm, using microwave frequency light incident for a range of angles. They report that the object remains well hidden in all cases.

These smart metamaterial cloaks provide a new avenue to explore adaptable, real-world applications of cloaking that are not limited by the objects they hide.


Story Source:

The above story is based on materials provided by ResearchSEA. Note: Materials may be edited for content and length.


Journal Reference:

  1. Dongheok Shin, Yaroslav Urzhumov, Youngjean Jung, Gumin Kang, Seunghwa Baek, Minjung Choi, Haesung Park, Kyoungsik Kim, David R. Smith. Broadband electromagnetic cloaking with smart metamaterials. Nature Communications, 2012; 3: 1213 DOI: 10.1038/ncomms2219

Cite This Page:

ResearchSEA. "Materials science: One size cloaks all." ScienceDaily. ScienceDaily, 23 November 2012. <www.sciencedaily.com/releases/2012/11/121123132617.htm>.
ResearchSEA. (2012, November 23). Materials science: One size cloaks all. ScienceDaily. Retrieved March 28, 2015 from www.sciencedaily.com/releases/2012/11/121123132617.htm
ResearchSEA. "Materials science: One size cloaks all." ScienceDaily. www.sciencedaily.com/releases/2012/11/121123132617.htm (accessed March 28, 2015).

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