title: Simultaneous realization of transmission enhancement and directional beaming of dual-wavelength light by a metal nanoslit.
abstract: Transmission enhanced dual-wavelength light beaming is realized by a dielectric-metal-dielectric structure. Guided-mode resonance theory is used on the dielectric grating flanked single nanoslit in an optically thick metal to predict the original structure parameters for transmission enhanced dual-wavelength (442 nm and 633 nm) light beaming. Finite-difference time-domain numerical simulations confirm the theoretical prediction and demonstrate that the normalized-to-area transmittance of 10.8 and 14.7 and beaming angle of 2.40 degrees and 2.65 degrees for 442 nm and 633 nm, respectively, are achieved with a single structure, suggesting the potential applications of such structures in optical data storage, nanoscale wavelength multiplexing, directional light sources and emitters.
authors.affiliation: Department of Physics, Key Laboratory of Acoustic and Photonic Materials and Devices, Ministry of Education, Wuhan University, Wuhan 430072, China
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Guo Ping
authors.initials: GP
authors.lastname: Wang
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008670:Metals / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity
chemical_list: D008670:Metals