Phys. Rev. Lett. 102, 233901 (2009) [4 pages]

Cloaking a Sensor

Abstract

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Andrea Alù^1,2,† and Nader Engheta^2,*
¹Department of Electrical and Computer Engineering, University of Texas at Austin, 1 University Station C0803, Austin, Texas 78712, USA
²Department of Electrical and Systems Engineering, University of Pennsylvania 200 South 33rd Street, ESE 203 Moore, Philadelphia, Pennsylvania 19103, USA

Received 6 February 2009; revised 8 April 2009; published 8 June 2009

See accompanying Physics Viewpoint

We propose the general concept of cloaking a sensor without affecting its capability to receive, measure, and observe an incoming signal. This may be obtained by using a plasmonic sensor, based on cloaking, made of materials available in nature at infrared and optical frequencies, or realizable as a metamaterial at lower frequencies. The result is a sensing system that may receive and transmit information, while its presence is not perceived by the surrounding, which may be of fundamental importance in a wide range of biological, optics, physics, and engineering applications.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.102.233901

DOI:

10.1103/PhysRevLett.102.233901

PACS:

42.70.−a, 33.20.Fb, 42.50.Gy, 42.79.−e

^*To whom correspondence should be addressed: engheta@ee.upenn.edu

^†alu@mail.utexas.edu

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Phys. Rev. Lett. 102, 233901 (2009) [4 pages]

Cloaking a Sensor