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- Publications
- Influence
Coated nonmagnetic spheres with a negative index of refraction at infrared frequencies
- M. Wheeler, J. Aitchison, M. Mojahedi
- Physics
- 6 January 2006
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 index… Expand
Three-dimensional array of dielectric spheres with an isotropic negative permeability at infrared frequencies
- M. Wheeler, J. Aitchison, M. Mojahedi
- Materials Science
- 15 November 2005
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 relates… Expand
Infrared magnetic response in a random silicon carbide micropowder
- M. Wheeler, J. Aitchison, Jennifer I L Chen, G. Ozin, M. Mojahedi
- Materials Science
- 23 February 2009
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 treat… Expand
A Scattering-based Approach to the Design, Analysis, and Experimental Verification of Magnetic Metamaterials Made from Dielectrics
- M. Wheeler
- Materials Science
- 1 September 2010
- 13
- 1
Negative refraction in a photonic crystal with a metallic cross lattice basis
- M. Wheeler, J. Aitchison, M. Mojahedi
- Materials Science
- 8 April 2005
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 design… Expand
Microwave relay fading statistics as a function of a terrain clearance factor
- M. Wheeler
- Physics
- 1 March 1977
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 that… Expand
The influence of material absorption on the quality factor of photonic crystal cavities.
- T. Xu, M. Wheeler, H. Ruda, M. Mojahedi, J. Aitchison
- Materials Science, Medicine
- Optics express
- 11 May 2009
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 experimental… Expand
Coupled magnetic dipole resonances in sub-wavelength dielectric particle clusters
- M. Wheeler, J. Aitchison, M. Mojahedi
- Physics
- 1 May 2010
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 by… Expand
Highly confined mode above the light line in a two-dimensional photonic crystal slab
- T. Xu, M. Wheeler, S. Nair, H. Ruda, M. Mojahedi, J. Aitchison
- Physics
- 16 December 2008
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 cavity… Expand
Phase characteristics of spiral antennas for interferometer applications
- M. Wheeler
- Physics
- 1964
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. One… Expand
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