title: Refractive index dependence of the coupling characteristics between long-range surface-plasmon-polariton and dielectric waveguide modes.
abstract: The coupling characteristics of a hybrid coupler comprised of a long-range surface-plasmon-polariton (LRSPP) waveguide and a dielectric waveguide is analyzed with different detecting layers. Calculation results show that the coupling strength between the LRSPP mode and the dielectric-waveguide mode is rather sensitive to the refractive index of the detecting layer. This is promising to realize an integrated refractive index sensor with high resolution better than 4 x 10(-7) refractive index units or a modulator with rather low driving power and insert loss.
authors.affiliation: State Key Laboratory of Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. liu_fang@tsinghua.edu.cn
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.forename: Ruiyuan
authors.initials: R
authors.lastname: Wan
authors.forename: Yidong
authors.initials: Y
authors.lastname: Huang
authors.forename: Jiangde
authors.initials: J
authors.lastname: Peng