We propose a more practical method of realizing the superfocusing modes based on
waveguide structures, and present a numerical analysis of these structures using finite-difference
time-domain (FDTD) simulations. For metallic wedged structures coupled to dielectric
waveguides, we investigate a method of controlling superfocusing by changing the phase of
waveguide modes.

doi:10.1557/PROC-1182-EE13-05