9 January 2014 Glass-based confined structures fabricated by sol-gel and radio frequency sputtering
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Some of the main results obtained in the field of glass-based photonic crystal (PC) systems using complementary techniques, such as radio frequency (RF) sputtering and sol-gel route, are presented. Initially, rare earth-activated one-dimensional PCs fabricated by RF-sputtering technique will be discussed, specifically the cavity is constituted by an Er3+ -doped SiO2active layer inserted between two Bragg reflectors consisting of 10 pairs of SiO2/TiO2/layers. Moreover, from near infrared, transmittance and variable angle reflectance spectra have verified the presence of a stop band from 1500 to 2000 nm with a cavity resonance centered at 1749 nm at 0 deg and quality factor of 890. In the second case, a composite system based on polystyrene colloidal nanoparticles assembled and embedded in an elastomeric matrix will be presented in detail. This system has been designed as a structure that displays an iridescent green color that can be attributed to the PC effect. This feature has been exploited to create a chemical sensor; in fact optical measurements have evidenced that this system presents a different optical response as a function of the solvent applied on the surface, showing: (1) high sensitivity, (2) fast response, and (3) reversibility of the signal change.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Andrea Chiappini, Andrea Chiappini, Cristina Armellini, Cristina Armellini, Alessandro Carpentiero, Alessandro Carpentiero, Iustyna Vasilchenko, Iustyna Vasilchenko, Anna Lukowiak, Anna Lukowiak, Davor Ristic, Davor Ristic, Stefano Varas, Stefano Varas, Simone Normani, Simone Normani, Maurizio Mazzola, Maurizio Mazzola, Alessandro Chiasera, Alessandro Chiasera, } "Glass-based confined structures fabricated by sol-gel and radio frequency sputtering," Optical Engineering 53(7), 071804 (9 January 2014). https://doi.org/10.1117/1.OE.53.7.071804 . Submission:

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