title: Fiber-optic waveguide coupled surface plasmon resonance sensor.
abstract: A novel approach to give an excellent tunability and self-referencing capability was presented by applying a concept of waveguide coupled surface plasmon resonance mode to a fiber-optic sensor. The presence of dielectric waveguide sandwiched between two metal layers made it possible to precisely tune the resonance wavelength in a broad range from visible to infrared region and to generate multiple modes which may be selectively used for suitable applications. Our approach also verified the potential capability of self-referencing based on a remarkable difference in sensitivity between the plasmonic and waveguide modes excited by p- and s-polarized lights, respectively, without using an additional reference channel. Experimental measurement carried out on sucrose solutions with varying concentration demonstrated the feasibility of our approach.
authors.affiliation: Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
authors.forename: Jae Heon
authors.initials: JH
authors.lastname: Ahn
authors.forename: Tae Yeon
authors.initials: TY
authors.lastname: Seong
authors.forename: Won Mok
authors.initials: WM
authors.lastname: Kim
authors.forename: Taek Sung
authors.initials: TS
authors.lastname: Lee
authors.forename: Inho
authors.initials: I
authors.lastname: Kim
authors.forename: Kyeong-Seok
authors.initials: KS
authors.lastname: Lee