corner
corner
APS » Journals » Phys. Rev. E » Volume 78 » Issue 4
< Previous Article | Next Article >

Phys. Rev. E 78, 045602(R) (2008) [4 pages]

Effects of size and frequency dispersion in plasmonic cloaking

Download: PDF (295 kB) Buy this article Export: BibTeX or EndNote (RIS)

Andrea Alù1,2 and Nader Engheta1,*
1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
2Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78712-0240, USA

Received 15 May 2008; published 27 October 2008

The plasmonic venue to realize invisibility and cloaking [ A. Alù and N. Engheta Phys. Rev. E 72 016623 (2005)] is analyzed here in terms of its limitations and its frequency dispersion relative to the cloak size. Intrinsic limits due to causality and comparison with transformation-based cloaking techniques are discussed and analyzed. An interestingly simple low-dispersion cloak is also suggested for background materials with larger refractive index. These results may shed light on this scattering cancellation phenomenon, suggesting potential applications in scattering reduction and noninvasive probing.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.78.045602
DOI:
10.1103/PhysRevE.78.045602
PACS:
42.70.−a, 42.79.−e, 42.50.Gy, 33.20.Fb

*Corresponding author; engheta@ee.upenn.edu

 
< Previous Article | Next Article >