Photonics Research, Volume. 10, Issue 3, 719(2022)
Influence of non-Hermitian mode topology on refractive index sensing with plasmonic waveguides
Fig. 1. Concept schematic overview of the present study. A plasmonic waveguide sensor can be used to identify change in the refractive index of an analyte (blue: dielectric; yellow: metal; green: analyte; interaction length:
Fig. 2. Concept schematic of the plasmonic waveguide sensor considered. The fundamental mode input of a dielectric silica waveguide (width:
Fig. 3. (a) Summary schematic of relevant modes. Solid blue/orange curves: hybrid modes of a silica waveguide of finite width in contact with a thin gold film. The blue dashed curve corresponds to an equivalent system without gold film (dielectric mode), and orange dashed curve corresponds to an equivalent system with infinite silica width (plasmonic mode). The associated
Fig. 4. (a) Spectral distribution of power in the fundamental dielectric waveguide mode at output as a function of wavelength
Fig. 5. Calculated transmission spectra (single-mode output) as a function of
Fig. 6. (a) Resonant wavelength
Fig. 7. (a) Calculated transmission spectra (single-mode output) as a function of
Fig. 8. (a) First resonance dip
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Alessandro Tuniz, Markus A. Schmidt, Boris T. Kuhlmey. Influence of non-Hermitian mode topology on refractive index sensing with plasmonic waveguides[J]. Photonics Research, 2022, 10(3): 719
Category: Surface Optics and Plasmonics
Received: Nov. 18, 2021
Accepted: Jan. 13, 2022
Published Online: Feb. 22, 2022
The Author Email: Alessandro Tuniz (alessandro.tuniz@sydney.edu.au)