2019/02/24 by Shahin Firuzi, Firuzi, Shahin, Shengping Gong +1
Engineering · Materials Science · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Metamaterials and Metasurfaces Applications #Photonic Crystals and Applications #Photonic and Optical Devices #physics.app-ph
paper · pdf · doi:10.48550/arxiv.1903.04398
arxiv created 2019/02/24 · openalex publication_date 2019/02/24 · arxiv updated 2019/03/12 · openalex created_date 2019/03/22 · openalex updated_date 2026/07/28
Transformation optics based on conformal mapping (CM) technique provides a practical approach to designing arbitrary-shaped all-dielectric devices. However, CM may result in large impractical refractive indices unachievable by current fabrication techniques. Furthermore, due to the low design flexibility of CM, the index-matching conditions at the ports of the device can not be realized as well. In this paper we introduce a method for tailoring the CM generated graded refractive index, in order to decrease its maximum value and apply index-matching, while maintaining the propagation path within the device unchanged. This technique is applied to two arbitrary index-matched waveguides. The full-wave simulation is performed to show the efficiency of the tailored-index index-matched waveguides for different relative wavelengths.