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We developed a facile route for separating and detecting phenethylamine from plasma using photonic crystal biosilica, which serves as a new lab-on-chip platform combining surface-enhanced Raman scattering sensing and thin layer chromatography.
The detection of a small number of molecules in miniature amount of solution is of pivotal significance in many applications including biomedicine, homeland security, forensics, and environmental protection. Surface-Enhanced Raman scattering (SERS) offers the potential for label-free sensing of many chemicals due to its unprecedented sensitivity and specificity. However, the performance of SERS sensing...
Infrared (IR) absorption spectroscopy is widely accepted as a reliable technique for chemical and biological sensing. However, most commercially available IR spectroscopy systems are expensive, bulky bench-top instruments. Demand for developing low cost, portable IR spectroscopy system is continuously growing, especially an on-chip IR spectroscopy that can be conveniently used for field testing is...
We experimentally demonstrate 2-D photonic crystal slab-coupled plasmonic nanocapsules for surface enhanced Raman spectroscopy (SERS). A strong Raman signal enhancement can be unambiguously detected even with a low concentration 10 nM dye molecules.
We present theoretical and experimental analysis of extraordinary third-order harmonic generation (THG) by organic materials on a plasmonic photonic crystal. The measurement shows that the hybrid nanostructure platform provides over 20 times enhancement in THG efficiency.
We experimentally demonstrate a new type of micro-fluid channel design with crossing optical waveguides that not only block any gaps in the microfluidic channels in one fabrication step but also enable nearly lossless optical propagation in the primary waveguides on a chip. Such designs are critical for all sensing applications where the analyte must be flowed over the sensor.
We experimentally demonstrate highly efficient coupling into a slotted-photonic crystal waveguide featuring a nearly flat transmission spectrum with lowest insertion loss ∼2.4dB.
We demonstrate on-chip tunable true-time-delay (TTD) lines based on photonics crystal waveguides. Measurement results show a maximum time delay of 260pS with a 3mm PCW.
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