title: Back focal plane imaging of directional emission from dye molecules coupled to one-dimensional photonic crystals.
abstract: Bloch surface waves (BSWs) on one-dimensional photonic crystals (1DPCs) have been used to beam the fluorescence emission from the dye molecules. All dielectric 1DPC displays its low propagating loss, narrow resonance and the absence of absorption or quenching. In this paper, back focal plane imaging reveals that in addition to the BSW mode, a guided mode and a cavity mode also exist in the 1DPC which all couple with the excited dye molecules. The appearance of these modes is sensitive to the wavelength of the fluorescence and alters the beaming effect by the 1DPC. Numerical simulations verify the existence of these modes which are consistent with the experimental results. Comparisons between the Bloch surface wave coupled emission and surface plasmon coupled emission are also presented for a clearer understanding of the multilayered film enabled directional emission.
authors.affiliation: Institute of Photonics, Department of Optics and Optical engineering, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Douguo
authors.initials: D
authors.lastname: Zhang
authors.forename: Ramachandram
authors.initials: R
authors.lastname: Badugu
authors.forename: Yikai
authors.initials: Y
authors.lastname: Chen
authors.forename: Sisheng
authors.initials: S
authors.lastname: Yu
authors.forename: Peijun
authors.initials: P
authors.lastname: Yao
authors.forename: Pei
authors.initials: P
authors.lastname: Wang
authors.forename: Hai
authors.initials: H
authors.lastname: Ming
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Lakowicz
mesh_terms: D003198:Computer Simulation; D003460:Crystallization; D004867:Equipment Design; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000032:analysis*; D008956:Models, Chemical; D017785:Photons; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*; D020349:Surface Plasmon Resonance
chemical_list: D005456:Fluorescent Dyes