Multiple Bloch surface wave excitation with gratings

Autor:	Asilevi Atsu L., Descrovi Emiliano, Pesonen Henri, Roussey Matthieu, Turunen Jari
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	evanescent waves surface electromagnetic waves bloch surface waves multiple bloch surface waves mbsws Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
Zdroj:	Journal of the European Optical Society-Rapid Publications, Vol 20, Iss 1, p 9 (2024)
Druh dokumentu:	article
ISSN:	1990-2573
DOI:	10.1051/jeos/2024007
Popis:	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.
Databáze:	Directory of Open Access Journals
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