Tamm plasmon resonance in mesoporous multilayers: toward a sensing application

BAPTISTE AUGUIÉ; M. CECILIA FUERTES; PAULA C. ANGELOMÉ; NICOLÁS LÓPEZ ABDALA; GALO J. A. A. SOLER-ILLIA; ALEJANDRO FAINSTEIN

ACS Photonics

American Chemical Society

Año: 2014 vol. 1 p. 775 - 780

A novel optical sensor is proposed, based on the normal-incidence excitation of Tamm plasmons at the interface between a multilayer of porous SiO2 and TiO2, acting as a permeable Bragg reflector, and a flat gold film. Transmittance spectra reveal a sharp Tamm mode within the stop-band of the distributed Bragg reflector, the spectral position of which was monitored upon exposure to various solvents, demonstrating the sensitivity of the device to changes of refractive index.