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7 Apr 2003

Volume 82, Issue 14, pp. 2197-2358

Issue Cover Spotlight Figure

Appl. Phys. Lett. 82, 2329 (2003); http://dx.doi.org/10.1063/1.1565509 (3 pages)

D. Fujita and T. Kumakura
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Origin of dissipative losses in negative index of refraction materials

R. B. Greegor, C. G. Parazzoli, K. Li, and M. H. Tanielian

Appl. Phys. Lett. 82, 2356 (2003); http://dx.doi.org/10.1063/1.1563726 (3 pages) | Cited 24 times

Online Publication Date: 2 April 2003

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Negative index of refraction materials have been postulated for many years but have only recently been realized in practice. In the microwave region these materials are constructed of rings and wires deposited on a dielectric substrate to form a unit cell. We have constructed, experimentally characterized, and simulated several of these structures operating in the 10–16 GHz range. The origin of the dissipative losses has been identified and effective schemes to reduce them devised and implemented. Numerical simulation and experimental verification shows that losses in negative index of refraction materials can be significantly reduced by minimizing the underlying losses of the constituent materials. © 2003 American Institute of Physics.
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78.70.Gq Microwave and radio-frequency interactions
77.22.Gm Dielectric loss and relaxation
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
78.66.Bz Metals and metallic alloys
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