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Coated nonmagnetic spheres with a negative index of refraction at infrared frequencies
Received 4 October 2005; revised manuscript received 28 November 2005; published 6 January 2006A three-dimensional lattice of micron-scale coated spheres is shown to have an isotropic negative indexExpand
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Three-dimensional array of dielectric spheres with an isotropic negative permeability at infrared frequencies
A negative effective permeability is shown to exist at infrared frequencies in a three-dimensional collection of polaritonic spheres. This is demonstrated by an effective medium theory which relatesExpand
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Infrared magnetic response in a random silicon carbide micropowder
Received 13 August 2008; revised manuscript received 27 January 2009; published 23 February 2009 We generalize the theoretical model of magnetic metamaterials made of dielectric particles to treatExpand
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Negative refraction in a photonic crystal with a metallic cross lattice basis
A metamaterial with a negative effective index of refraction is made from a two-dimensional square lattice photonic crystal with a metallic cross lattice basis. A simple procedure is given to designExpand
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Microwave relay fading statistics as a function of a terrain clearance factor
Three sources of microwave relay fade statistics are examined to show that their differences may be explained on the basis of ground clearance at midpath. An empirical expression is suggested thatExpand
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The influence of material absorption on the quality factor of photonic crystal cavities.
Accounting for material absorption is very important for developing high quality factor (Q) photonic crystal cavities. However, to our knowledge, there have been very few systematic experimentalExpand
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Coupled magnetic dipole resonances in sub-wavelength dielectric particle clusters
Dielectric spheres which are much smaller than a wavelength and made of a large permittivity can support magnetic dipole modes of great purity. We investigate the coupling of such magnetic dipoles byExpand
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Highly confined mode above the light line in a two-dimensional photonic crystal slab
We found that certain modes above the light line can satisfy total internal reflection in a two-dimensional photonic crystal slab, resulting in negligible vertical leakage. A heterogeneous cavityExpand
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Phase characteristics of spiral antennas for interferometer applications
Several recent applications of the flat spiral antenna require a well defined phase center as well as a very low ellipticity ratio of the polarization over wide angles of the radiation pattern. OneExpand
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