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URN etd-0815112-151421 Statistics This thesis had been viewed 2659 times. Download 841 times. Author Ping-Jing Ho Author's Email Address No Public. Department Electro-Optical Engineering Year 2011 Semester 2 Degree Master Type of Document Master's Thesis Language Chinese&English Page Count 69 Title The Study of Surface Plasmon Resonance Sensor with AZO Thin Film Keyword AZO thin film optical fiber sensor surface plasmon resonance surface plasmon resonance optical fiber sensor AZO thin film Abstract The phenomenon of surface plasmon resonance (SPR) has some advantages such as high sensitive response, flexibility in real time measurements and label-free for biological sensing. Beside, the characteristics of the SPR fiber sensor have small volune, light weight, low cost, high sensitivity, and good durability working in the adverse circumstances. The multi-mode fiber which has core diametes of 62.5 μm has been applied in the chemical measurements.
We polished one side of the fiber down to core center and deposited a 40 nm thickness of Au thin film on the fiber side-polished surface. In this thesis, the material of the Al-doped ZnO (AZO) is introduced in the SPR fiber sensor. A thin film of AZO is coated above and under the Au thin film in order to investigate the SPR effect with respect to the SPR response of typical SPR fiber sensor. Both the sensitivity and signal-to-noise ratio (SNR) of the SPR fiber sensor we proposed will be study and dismissed, and the SPR fiber sensor with the Au/AZO and AZO/Au structures are also applied to the concentration measurements of the sodium acetate (CH_3COONa) solutions.
The results show that the SNR response of the SPR dip curves of the SPR fiber sensors with Au/AZO structure is better than that of the case with Au thin film only. And, the sensitivity of the SPR sensing can be increased significantly from 15.3 nm/M to 20.3 nm/M by virtue of introducing an AZO thin film with the thickness of 75 nm deposited on the Au film surface
Advisor Committee Woo-Hu Tsai - advisor
none - co-chair
Files Date of Defense 2012-07-26 Date of Submission 2012-08-21