Guided Bloch surface waves on ultrathin polymeric ridges.
We present a direct evidence of Bloch surface waves (BSWs) waveguiding on ultrathin polymeric ridges, supported by near-field measurements. It is demonstrated that near-infrared BSWs sustained by a silicon-based multilayer can be locally coupled and guided through dielectric ridges of nanometric thickness with low propagation losses. Using a conventional prism-based configuration, we demonstrate a wavelength-selective BSW coupling inside and outside the ridge. Such a result can open interesting opportunities in surface wave-mediated sensing applications, where light could be selectively coupled in specific regions defined by nanometric reliefs.
Descrovi
Emiliano
E
Materials and Microsystems Laboratory, Politecnico di Torino, C.so Duca degli Abruzzi 24, IT-10129 Torino, Italy. emiliano.descrovi@polito.it
Sfez
Tristan
T
Quaglio
Marzia
M
Brunazzo
Daniele
D
Dominici
Lorenzo
L
Michelotti
Francesco
F
Herzig
Hans Peter
HP
Martin
Olivier J F
OJ
Giorgis
Fabrizio
F