Left handed dispersion of a stack of subwavelength hole metal arrays at terahertz frequencies

摘要: We report on the electromagnetic response of a stack subwavelength hole metal arrays. The samples were designed for exhibiting left handed dispersion branches under normal incidence, and their transmissivities optimized via fabrication elliptical-shaped holes. They are constituted benzocyclobutene layers with tens micron thicknesses submicron-thick gold films patterned by photolithography. Experimental evidence, achieved time-domain terahertz spectroscopy supported full wave simulations, ground branch is found around 0.45 THz. insertion losses −3 dB five-layer structure, this good level being explained matching impedance.