Departmental Papers (ESE)
Title
Effects of size and frequency dispersion in plasmonic cloaking
Document Type
Journal Article
Date of this Version
October 2008
Abstract
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.
Keywords
metamaterials, optical dispersion, plasmons, refractive index
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Date Posted: 11 December 2008
This document has been peer reviewed.
Comments
Copyright American Physical Society. Reprinted from Physical Review E, Volume 78, Issue 4, Article 045602(R), October 2008.
Publisher URL: http://dx.doi.org/10.1103/PhysRevE.78.045602