title: All-polymer photonic crystal slab sensor.
abstract: 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 × 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 ZrO2based 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.
authors.forename: Pétur G
authors.initials: PG
authors.lastname: Hermannsson
authors.forename: Kristian T
authors.initials: KT
authors.lastname: Sørensen
authors.forename: Christoph
authors.initials: C
authors.lastname: Vannahme
authors.forename: Cameron L C
authors.initials: CL
authors.lastname: Smith
authors.forename: Jan J
authors.initials: JJ
authors.lastname: Klein
authors.forename: Maria-Melanie
authors.initials: MM
authors.lastname: Russew
authors.forename: Gabi
authors.initials: G
authors.lastname: Grützner
authors.forename: Anders
authors.initials: A
authors.lastname: Kristensen