title: Multi-color fluorescence imaging based on plasmonic wavelength selection and double illumination by white light.
abstract: We demonstrate the proof-of-concept for developing a multi-color fluorescence imaging system based on plasmonic wavelength selection and double illumination by white light source. This technique is associated with fluorescence excitation by transmitted light via a diffraction of propagating surface plasmons. Since double illumination through both sides of isosceles triangle prism in the Kretschmann configuration enables multiple transmission beams of different wavelengths to interact with the specimen, our approach can be an alternative to conventional fluorescence detection owing to alignment stability and functional expandability. After fabricating a plasmonic wavelength splitter and integrating it with microscopic imaging system, we successfully confirm the performance by visualizing in vitro neuron cells labeled with green and red fluorescence dyes. The suggested method has a potential that it could be combined with plasmonic biosensor scheme to realize a multi-functional platform which allows imaging and sensing of biological samples at the same time.
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Choi
authors.forename: Kyungsik
authors.initials: K
authors.lastname: Eom
authors.forename: Seoyoung
authors.initials: S
authors.lastname: Hwang
authors.forename: Yena
authors.initials: Y
authors.lastname: Lee
authors.forename: Sang Beom
authors.initials: SB
authors.lastname: Jun
authors.forename: Kyung Min
authors.initials: KM
authors.lastname: Byun
authors.forename: Sung June
authors.initials: SJ
authors.lastname: Kim