Low-loss directional cloaks without superluminal velocity or magnetic response.


Autoria(s): Urzhumov, Y; Smith, DR
Data(s)

01/11/2012

Resumo

The possibility of making an optically large (many wavelengths in diameter) object appear invisible has been a subject of many recent studies. Exact invisibility scenarios for large (relative to the wavelength) objects involve (meta)materials with superluminal phase velocity [refractive index (RI) less than unity] and/or magnetic response. We introduce a new approximation applicable to certain device geometries in the eikonal limit: piecewise-uniform scaling of the RI. This transformation preserves the ray trajectories but leads to a uniform phase delay. We show how to take advantage of phase delays to achieve a limited (directional and wavelength-dependent) form of invisibility that does not require loss-ridden (meta)materials with superluminal phase velocities.

This work was supported through a Multidisciplinary University Research Initiative, sponsored by the U.S. Army Research Office (Grant No. W911NF-09-1-0539), and partially supported by the U.S. Navy through a subcontract with SwampWorks (Contract No. N00167- 11-P-0292).

Formato

4471 - 4473

Identificador

http://www.ncbi.nlm.nih.gov/pubmed/23114333

244654

Opt Lett, 2012, 37 (21), pp. 4471 - 4473

http://hdl.handle.net/10161/7575

1539-4794

Idioma(s)

ENG

en_US

Relação

Opt Lett

Optics Letters

Tipo

Journal Article

Cobertura

United States