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Lithium niobate (LN)-based devices are widely used in integrated and nonlinear optics. This material is robust and resistive to high temperatures, which makes the LN-based devices stable, but challenging to fabricate. In this work, we report on the design, manufacturing, and characterization of engineered dielectric media with thin-film LN (TFLN) on top for the coupling and propagation of electromagnetic surface waves at telecommunication wavelengths. The designed one-dimensional photonic crystal (1DPhC) sustains Bloch surface waves (BSWs) at the multilayer–air interface at 1550 nm wavelength with a propagation detected over a distance of 3 mm. The working wavelength and improved BSW propagation parameters open the way for exploration of nonlinear properties of BSW-based devices. It is also expected that these novel devices potentially would be able to modify BSW propagation and coupling by external thermal–electrical stimuli due to the improved quality of the TFLN top layer of 1DPhC.
Romain Christophe Rémy Fleury, Bakhtiyar Orazbayev, Nadège Sihame Kaïna
Nicolas Grandjean, Romuald Houdré, Jean-François Carlin, Matteo Galli, Jun Wang, Marco Clementi, Momchil Minkov
Dimitrios Kyritsis, Gökan May, Foivos Psarommatis Giannakopoulos