Journal
OPTICS EXPRESS
Volume 23, Issue 13, Pages 16529-16539Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.016529
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Funding
- European Commission under the Seventh Framework Programme (FP7) [278204]
- Strategic Research Center PolyNano - Danish Council for Strategic Research [10-092322]
- Danish Research Council for Technology and Production Sciences [12-126676, 12-126601]
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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. (C) 2015 Optical Society of America
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