Navigation Links
'Metascreen' forms ultra-thin invisibility cloak
Date:3/25/2013

Up until now, the invisibility cloaks put forward by scientists have been fairly bulky contraptions an obvious flaw for those interested in Harry Potter-style applications.

However, researchers from the US have now developed a cloak that is just micrometres thick and can hide three-dimensional objects from microwaves in their natural environment, in all directions and from all of the observers' positions.

Presenting their study today, 26 March, in the Institute of Physics and German Physical Society's New Journal of Physics, the researchers, from the University of Texas at Austin, have used a new, ultrathin layer called a "metascreen".

The metascreen cloak was made by attaching strips of 66 m-thick copper tape to a 100 m-thick, flexible polycarbonate film in a fishnet design. It was used to cloak an 18 cm cylindrical rod from microwaves and showed optimal functionality when the microwaves were at a frequency of 3.6 GHz and over a moderately broad bandwidth.

The researchers also predict that due to the inherent conformability of the metascreen and the robustness of the proposed cloaking technique, oddly shaped and asymmetrical objects can be cloaked with the same principles.

Objects are detected when waves whether they are sound, light, x-rays or microwaves rebound off its surface. The reason we see objects is because light rays bounce off their surface towards our eyes and our eyes are able to process the information.

Whilst previous cloaking studies have used metamaterials to divert, or bend, the incoming waves around an object, this new method, which the researchers dub "mantle cloaking", uses an ultrathin metallic metascreen to cancel out the waves as they are scattered off the cloaked object.

"When the scattered fields from the cloak and the object interfere, they cancel each other out and the overall effect is transparency and invisibility at all angles of observation," said co-author of the study Professor Andrea Alu.

"The advantages of the mantle cloaking over existing techniques are its conformability, ease of manufacturing and improved bandwidth. We have shown that you don't need a bulk metamaterial to cancel the scattering from an object a simple patterned surface that is conformal to the object may be sufficient and, in many regards, even better than a bulk metamaterial."

Last year, the same group of researchers were the first to successfully cloak a 3D object in another paper published in New Journal of Physics, using a method called "plasmonic cloaking", which used more bulky materials to cancel out the scattering of waves.

Moving forward, one of the key challenges for the researchers will be to use "mantle cloaking" to hide an object from visible light.

"In principle this technique could also be used to cloak light," continued Professor Alu.

"In fact, metascreens are easier to realize at visible frequencies than bulk metamaterials and this concept could put us closer to a practical realization. However, the size of the objects that can be efficiently cloaked with this method scales with the wavelength of operation, so when applied to optical frequencies we may be able to efficiently stop the scattering of micrometer-sized objects.

"Still, we have envisioned other exciting applications using the mantle cloak and visible light, such as realizing optical nanotags and nanoswitches, and noninvasive sensing devices, which may provide several benefits for biomedical and optical instrumentation."


'/>"/>

Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

Related biology technology :

1. Achieving Optimal Performance from Single-Use Platforms, New Life Science Webinar Hosted by Xtalks
2. BioHealth Innovation, Inc. Forms Commercial Relevance Advisory Board to Help Advance Market-Relevant Innovations in Central Maryland
3. Lucintel Performs Competitive Analysis on Top Five Global Consumer Electronic Companies
4. The Alliance for Regenerative Medicine forms Tissue Engineering and Biomaterials Committee
5. New Report: "Innovations in Drug Delivery - Broad-based Proprietary Technology Platforms to Address Delivery Efficiency and Improve Patient Compliance" Now Available at Twease.org
6. Cloak of invisibility: Engineers use plasmonics to create an invisible photodetector
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/12/2017)... , ... October 12, 2017 , ... ... Vilnius, Lithuania, announced today that they have entered into a multiyear collaboration to ... provide CRISPR researchers with additional tools for gene editing across all applications. , ...
(Date:10/11/2017)... N.C. (PRWEB) , ... October 11, 2017 , ... ... ARCS® Foundation President Andi Purple announced Dr. Suneel I. Sheikh, the co-founder, ... ( ASTER Labs ), Inc. has been selected for membership in ARCS ...
(Date:10/11/2017)... Oct. 11, 2017  VMS BioMarketing, a leading provider of ... oncology Clinical Nurse Educator (CNE) network, which will launch this ... communication among health care professionals to enhance the patient care ... staff, and other health care professionals to help women who ... ...
(Date:10/10/2017)... ... October 10, 2017 , ... San Diego-based team building ... corporate rebranding initiative announced today. The bold new look is part of a ... company moves into a significant growth period. , It will also expand its service ...
Breaking Biology Technology:
(Date:4/17/2017)... MELBOURNE, Florida , April 17, 2017 ... security technology company, announces the filing of its 2016 Annual Report ... Securities and Exchange Commission. ... Report on Form 10-K is available in the Investor Relations section ... well as on the SEC,s website at http://www.sec.gov . ...
(Date:4/11/2017)... Fla. , April 11, 2017 ... and secure authentication solutions, today announced that it ... Intelligence Advanced Research Projects Activity (IARPA) to develop ... Thor program. "Innovation has been a ... IARPA,s Thor program will allow us to innovate ...
(Date:4/11/2017)... MELBOURNE, Florida , April 11, 2017 ... "Company"), a security technology company, announces the appointment of independent ... John Bendheim to its Board of Directors, furthering the ... ... behalf of NXT-ID, we look forward to their guidance and ...
Breaking Biology News(10 mins):