All-polymer photonic crystal slab sensor

作者：Hermannsson Petur G; Sorensen Kristian T; Vannahme Christoph; Smith Cameron L C; Klein Jan J; Russew Maria Melanie; Gruetzner Gabi; Kristensen Anders^*

来源：Optics Express, 2015, 23(13): 16529-16539.

DOI：10.1364/OE.23.016529

An all-polymer photonic crystal slab sensor is presented, and shown to exhibit narrow resonant reflection with a FWHM of less than 1 nm and a sensitivity of 31 nm/RIU when sensing media with refractive indices around that of water. This results in a detection limit of 4.5 x 10(6) RIU when measured in conjunction with a spectrometer of 12 pm/pixel resolution. The device is a two-layer structure, composed of a low refractive index polymer with a periodically modulated surface height, covered with a smooth upper-surface high refractive index inorganic-organic hybrid polymer modified with ZrO2-based nanoparticles. Furthermore, it is fabricated using inexpensive vacuum-less techniques involving only UV nanoreplication and polymer spin-casting, and is thus well suited for single-use biological and refractive index sensing applications.

• 出版日期2015-6-29