Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 20, Number 1, 2024
Current challenges and solutions in guided wave optics and integrated photonics
|
|
---|---|---|
Article Number | 9 | |
Number of page(s) | 9 | |
DOI | https://doi.org/10.1051/jeos/2024007 | |
Published online | 01 April 2024 |
Research Article
Multiple Bloch surface wave excitation with gratings
1
Center for Photonics Sciences, Department of Physics and Mathematics, University of Eastern Finland, PO Box 111, 80101 Joensuu, Finland
2
Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, 10129 Torino, Italy
3
Dispelix Oy, Yliopistokatu 7, FI-80130 Joensuu, Finland
* Corresponding author: lewisa@uef.fi
Received:
14
December
2023
Accepted:
21
February
2024
We study the coupling of a finite number of Bloch Surface Waves (BSWs) propagating in different directions at the surface of a dielectric multilayer. These surface waves arise from a set of diffraction orders associated to a grating on the bottom surface of the substrate that is illuminated by a normally incident beam. Simultaneous excitation of multiple BSWs is possible with a set of diffraction orders having the same radial spatial frequency. Using rigorous electromagnetic theory, we design gratings for simultaneous excitation of two, four and six BSWs propagating in directions separated by π, π/2 and π/3 azimuthal intervals, respectively.
Key words: Evanescent waves / Surface electromagnetic waves / Bloch surface waves / Multiple bloch surface waves / MBSWs
© The Author(s), published by EDP Sciences, 2024
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