Physics – Optics
Scientific paper
2010-09-22
Physics
Optics
25 pages, 10 figures (minor revisions)
Scientific paper
The intriguing concept of "anti-cloaking" has been recently introduced within the framework of transformation optics (TO), first as a "countermeasure" to invisibility-cloaking (i.e., to restore the scattering response of a cloaked target), and more recently in connection with "sensor invisibility" (i.e., to strongly reduce the scattering response while maintaining the field-sensing capabilities). In this paper, we extend our previous studies, which were limited to a two-dimensional cylindrical scenario, to the three-dimensional spherical case. More specifically, via a generalized (coordinate-mapped) Mie-series approach, we derive a general analytical full-wave solution pertaining to plane-wave-excited configurations featuring a spherical object surrounded by a TO-based invisibility cloak coupled via a vacuum layer to an anti-cloak, and explore the various interactions of interest. With a number of selected examples, we illustrate the cloaking and field-restoring capabilities of various configurations, highlighting similarities and differences with respect to the cylindrical case, with special emphasis on sensor-cloaking scenarios and ideas for approximate implementations that require the use of double-positive media only.
Alu' Andrea
Castaldi Giuseppe
Engheta Nader
Galdi Vincenzo
Gallina Ilaria
No associations
LandOfFree
Analytical study of spherical cloak/anti-cloak interactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analytical study of spherical cloak/anti-cloak interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analytical study of spherical cloak/anti-cloak interactions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-637883