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PhD Final Examination – Xinyuan Chong


Friday, June 9, 2017 9:00 AM - 11:00 AM

Surface-Enhanced Infrared Absorption Gas Sensing Incorporating Advanced Plasmonic Nanostructures and Nano-Composite Materials
This dissertation focuses on extending the application scope of surface enhanced infrared absorption spectroscopy to gas sensing. The method we propose is incorporating plasmonic nanostructures with nano-composite material, metal-organic framework, which can selectively preconcentrate certain gas molecules into the nanopores. The preconcentrating property is first demonstrated by applying metal-organic framework to optical fiber based sensor. Then two different metal-organic framework integrated surface enhanced infrared absorption gas sensors fabricated on bulk substrate and nano-membrane are investigated, and the high enhancement factors demonstrated for the first time. Lastly, an on-chip spectrometer using high resolution plasmonic filter array is proposed and experimentally demonstrated for resolving CO2 absorption spectrum at 2.0 μm with 10 ~ 12 nm resolution. This filter array spectrometer is simple and low-cost, which can be potentially used for portable gas spectroscopy system.

Major Advisor: Alan Wang
Committee: Larry Cheng
Committee: Matthew Johnston
Committee: Chih-Hung Chang
GCR: William Warnes


Kelley Engineering Center (campus map)
1005
Calvin Hughes
1 541 737 3168
Calvin.Hughes at oregonstate.edu
Sch Elect Engr/Comp Sci
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