Abstract
Recently suggested magnifying Maxwell fisheye lenses, which are made of two half-lenses of different radii, have been fabricated and characterized. The lens action is based on control of polarization-dependent effective refractive index in a lithographically formed tapered waveguide. We have studied wavelength and polarization dependent performance of the lenses, and their potential applications in waveguide mode sorting.
Highlights
Transformation optics (TO) has recently become a useful methodology for the design of unusual optical devices, such as novel metamaterial lenses and invisibility cloaks
Since the developed lithographic Maxwell fisheye lenses are based on tapered waveguide geometry, their high magnification and very compact design are highly suitable in waveguide mode geometry, their high magnification and very compact design are highly suitable in waveguide mode
Compact and efficient mode sorters are required in on-chip mode-division geometry, their[7]high and very compact designMultiphysics are highly suitable in waveguide mode multiplexing andmagnification sensing [8] applications
Summary
Transformation optics (TO) has recently become a useful methodology for the design of unusual optical devices, such as novel metamaterial lenses and invisibility cloaks. Very recently we have demonstrated that many transformation optics and metamaterial-based devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides [1] This approach leads to low-loss broadband performance in the visible frequency range, which is difficult to achieve by other means. We have applied this technique to broadband electromagnetic cloaking in the visible range [1] and successfully extended it to birefrigent TO devices, which perform useful and different functions for mutually orthogonal polarization states of light [2]. In this paper we have applied this approach to lithographically fabricated magnifying Maxwell fisheye lenses, which were originally introduced in a microdroplet form [3]
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