Origin of dissipative losses in negative index of refraction materials

Greegor, R. B.; Parazzoli, C. G.; Li, K.; Tanielian, M. H.
April 2003
Applied Physics Letters;4/7/2003, Vol. 82 Issue 14, p2356
Academic Journal
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.


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