Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.86.013804
Title: Diameter-bandwidth product limitation of isolated-object cloaking
Authors: Hashemi, H.
Qiu, C.-W. 
McCauley, A.P.
Joannopoulos, J.D.
Johnson, S.G.
Issue Date: 5-Jul-2012
Source: Hashemi, H., Qiu, C.-W., McCauley, A.P., Joannopoulos, J.D., Johnson, S.G. (2012-07-05). Diameter-bandwidth product limitation of isolated-object cloaking. Physical Review A - Atomic, Molecular, and Optical Physics 86 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.86.013804
Abstract: We show that cloaking of isolated objects using transformation-based cloaks is subject to a diameter-bandwidth product limitation: as the size of the object increases, the bandwidth of good (small-cross-section) cloaking decreases inversely with the diameter, as a consequence of causality constraints even for perfect fabrication and materials with negligible absorption. This generalizes a previous result that perfect cloaking of isolated objects over a nonzero bandwidth violates causality. Furthermore, we demonstrate broader causality-based scaling limitations on any bandwidth-averaged cloaking cross section, using complex analysis and the optical theorem to transform the frequency-averaged problem into a single-scattering problem with transformed materials. © 2012 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/55631
ISSN: 10502947
DOI: 10.1103/PhysRevA.86.013804
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