2024/05/23 by Wenjing Lv, Jiaojiao Zhou, Lv, Wenjing +5
Engineering · #Advanced Antenna and Metasurface Technologies #Advanced Materials and Mechanics #Classical Physics (physics.class-ph) #FOS: Physical sciences #Optics (physics.optics) #Structural Analysis and Optimization
paper · pdf · doi:10.48550/arxiv.2405.14550
openalex publication_date 2024/05/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Either conformal transformation optics or geodesic mapping provides a design method to bend light rays in two-dimensional space with a nonuniform refractive index profile. In this paper, we combine both methods above to design a conformal invisible cloak based on bi-spheres with a refractive index profile varying from 0 to 10.7, smaller than 24.6 for the previous case of a single sphere. Moreover, we obtain an omnidirectional retro-reflector and a specular reflector by making position adjustments to mirrors, and achieve similar invisible effect by tuning sizes of the bi-spheres. Our work expands the toolkits for designing conformal devices with continuously-varying index profile.