Multilayered Maxwell's fisheye lens as waveguide crossing

Abstract

The Maxwell's fisheye (MFE) lens, due to its focusing properties, is an interesting candidate for implementing the crossing of multiple waveguides. The MFE lens is implemented by two different structures: concentric cylindrical multilayer and radially diverging gourd-shaped rods. Realization of the refractive index profile of the lens is achieved by controlling the thickness ratio of the alternating Si and SiO2 layers determined by effective medium theory. Both structures are optimized to cover the entire C-band in the single mode implementation. The transmission efficiency of the ring-based structure is superior to the radial-based implementation, however, the radial-based structure almost covers the entire U-band as well. Other communication bands are partially covered in both cases.Full-wave simulations prove that the performance of multimode waveguide crossing based on the MFE lens with a radius of 2.23 μm is promising with the average insertion loss of 0.17dB and crosstalk levels below -24.2dB in the C-band for TM0 and TM1 modes. The multimode intersection almost covers the entire C, L, and U bands of optical communication.

arXiv commentThis is the preprint of the accepted manuscript. https://doi.org/10.1016/j.optcom.2018.11.057

References in corpus (9)

• Optical Hyperlens: Far-field imaging beyond the diffraction limit
• Silicon nanostructure cloak operating at optical frequencies
• Quantum nanophotonics using hyperbolic metamaterials
• Electromagnetic cloaking by layered structure of homogeneous isotropic materials
• Perfect imaging without negative refraction
• Experimental Demonstration of Non-Resonant Hyperlens in the Visible Range
• Infrared carpet cloak designed with uniform silicon grating structure
• Photonic crystal waveguide intersection design based on Maxwell's fish-eye lens
• Electromagnetic modes of Maxwell fisheye lens

Cited by in corpus (11)

• Multimode waveguide crossing based on square Maxwell's fisheye lens
• Polygonal Maxwell's fisheye lens via transformation optics as multimode waveguide crossing
• Photonic crystal waveguide crossing based on transformation optics
• Ultra-thin silicon-on-insulator waveguide bend based on truncated Eaton lens implemented by varying the guiding layer thickness
• Low-index contrast waveguide bend based on truncated Eaton lens implemented by graded photonic crystals
• Polymer multimode waveguide bend based on a multilayered Eaton lens
• Ultrashort waveguide tapers based on Luneburg lens
• Maxwell's fisheye lens as efficient power coupler between dissimilar photonic crystal waveguides
• Coupling $S{i}_3{N}_4$ waveguide to SOI waveguide using transformation optics
• 3$\times$3 Slot waveguide crossing based on Maxwell's fisheye lens
• Coupling silica waveguides to photonic crystal waveguides through multilayered Luneburg lens