Flexible zero refractive index optical metamaterial with matched impedance

摘要

We demonstrate a flexible thin film zero refractive index optical metamaterial with matched impedance to free space andlow absorption loss at 1.55 μm. The metallo-dielectric multilayer structure with fishnet geometry was optimized by agenetic algorithm. The fabrication process and characterization approach are described. The experiment results agreewell with the theoretical predictions, showing an effective index of neff = 0.072 + 0.51i and an impedance of Zeff/Z0 = 1.009 – 0.021i.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.