Fast optical vapour sensing by Bloch surface waves on porous silicon membranes.
The coupling of optical Bloch surface waves at the truncated end of one dimensional porous silicon photonic crystals is exploited for fast vapour sensing. Self-standing multilayered membranes bound to transparent substrates were fabricated by electrochemical etching and used in an attenuated total reflection configuration to resonantly excite the surface waves and perform real-time sensing.
Michelotti
Francesco
F
SAPIENZA Università di Roma, Dipartimento di Energetica, Via A.Scarpa, 16 00161 Roma, Italy. francesco.michelotti@uniroma1.it
Sciacca
Beniamino
B
Dominici
Lorenzo
L
Quaglio
Marzia
M
Descrovi
Emiliano
E
Giorgis
Fabrizio
F
Geobaldo
Francesco
F