Wavefront control of microwaves with a conductive mesostructure: theory

Details Wavefront control of microwaves with a conductive mesostructure: theory Wavefront control of microwaves with a conductive mesostructure: theory

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4926..243c&link_type=abstract

Proc. SPIE Vol. 4926, p. 243-250, Adaptive Optics and Applications II, Wenhan Jiang; Robert K. Tyson; Eds.

Physics

Optics

Scientific paper

The initial theory for a novel type of wavefront controller for microwaves is described. This controller is based on the principle that the effective refractive index of a structure is a square root product between the permittivity and permeability of a material, n equals (root)(epsilon) (mu) . With high conductivity metals, such as silver, light acquires an effective mass so that the longitudinal mode has a finite frequency known as the plasma frequency. Below that frequency the dielectric function is negative, allowing no modes in the bulk of the metal. This is responsible for the amazing and unique properties of structured metals. One may, by extension of scale, design a metallic structure whose effective (epsilon) is negative, for wavelengths longer than the structure's unit cell. Such structures have been suggested recently by Pendry et al. The symmetry of Maxwell's equations implies that magnetic structures can be engineered from non-magnetic materials, so that an effective mu is produced down to negative values. An example of such a structure is investigated here in detail. I also discuss how the electric and magnetic structures are combined to produced a controllable refractive index over the unit cell, implying that we can construct wavefront controllers from conductive mesostructures.

Affiliated with

Also associated with

No associations

Rating

Wavefront control of microwaves with a conductive mesostructure: theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Wavefront control of microwaves with a conductive mesostructure: theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavefront control of microwaves with a conductive mesostructure: theory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1130785