Bloch Surface Waves are surface electromagnetic waves with very low intrinsic losses, existing in both in-plane and out-of plane polarizations, supported by a one-dimensional photonic crystal with an in-gap defect. We have developed thin-film deposition technology on CaF2 prisms suitable for biosensing applications of BSWs in the mid-infrared. Here we report spectroscopic evidence of BSWs, in perfect agreement with theory, in the wavelength range from 4 to 6 micrometers.
Spectroscopic Evidence of Bloch Surface Waves in the Mid Infrared / Ortolani, M.; Pea, M.; Occhicone, A.; Giliberti, V.; Sinibaldi, A.; Mattioli, F.; Cibella, S.; Polito, R.; Nucara, A.; Baldassarre, L.; Michelotti, F.. - 2019-:(2019), pp. 1-3. ((Intervento presentato al convegno 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 tenutosi a Maison de la Chimie, fra [10.1109/IRMMW-THz.2019.8874169].