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We present the realization of high-Q (Q=36,000) polymeric photonic crystal nanobeam cavities made of two polymers that have an ultra-low index contrast (ratio=1.15), and demonstrate that these polymer cavities are outstanding refractive index sensors (FOM=9190).
We present a colorimetric indicator that distinguishes organic liquids, projecting small differences in wettability into visually distinct color patterns. Photonic crystals serve as both selective carriers for liquids and sources of responsive color.
We use highly controlled partial wetting in chemically encoded 3D photonic crystals to study tunable disorder in structurally colored systems. Our experimental and FDTD analyses also guide our design of a colorimetric indicator for organic liquids.
An ultrasensitive nonlinear cavity sensing method is proposed and demonstrated, in which the detection limit is not bounded by the quality factor of the cavity. 10mg/dL glucose concentration and 100aM BSA molecules are detected.
We demonstrate a 3D porous photonic crystal whose inner surfaces are chemically functionalized in arbitrary spatial patterns with micro-scale resolution. We use this platform to demonstrate a method for solvent-specific multi-layer message encryption.
A fluorescence study was conducted on commercial dyes (squaraines; triphenylmethane dyes; porphyrins and chlorins) in thin films of polyvinyl alcohol (PVA), poly (methyl methacrylate) (PMMA) and Hival 5108, a commercial polystyrene (PS) from Ashland. Fluorescence quantum yields were measured for dye–polymer system and compared to liquid- and solid-phase media values. All dyes were found to have fluorescent...
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