title: Color-tuning and switching optical transport through CdS hybrid plasmonic waveguide.
abstract: We report the color-tuning and switching optical transport characters of CdS hybrid plasmonic waveguide by using near-field optical microscopy. The guided photoluminescence spectra under various waveguide lengths demonstrate a spectroscopic red-shift for the part of CdS nanoribbon placed on the sapphire substrate and an energy compensation at Ag film. Surface plasmon polariton leakage and radiation are explored by near-field characterizations. Finite difference time domain simulations have good agreement with the experimental observations of subwavelength confinement and propagation. With a strong end facet emission, the suggested hybrid plasmonic waveguide can serve as a color-changeable optical nanosource in integrated photonic devices.
authors.affiliation: School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Zheyu
authors.initials: Z
authors.lastname: Fang
authors.forename: Shan
authors.initials: S
authors.lastname: Huang
authors.forename: Feng
authors.initials: F
authors.lastname: Lin
authors.forename: Xing
authors.initials: X
authors.lastname: Zhu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D003116:Color; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008029:Lighting / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013440:Sulfides / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide