Multi-wavelength Infrared Alcohol Detection System

• Main Authors: Yi-Jung Tseng, 曾奕融
• Other Authors: 李嗣涔
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/e3252n

碩士 === 國立臺灣大學 === 光電工程學研究所 === 106 === The thesis investigated the integrated infrared device process, including triple-wavelength infrared thermal emitter and the corresponding plasmonic infrared photodetector developed in our laboratory to realize a multi-band alcohol detection system. The emitter adopt the structure of waveduide mode emitter embedded with golden grating in the dielectric layer and adding the Au / TiO2 / Au island structure on the top to produce the emission of localized surface plasmon resonance. The detector is Au/a-Si:H /Au grating structure which can be investigated by observing the wavelength red-shift wih the change of dielectric thickness and metallic linewidth. These devices are applied in non-dispersive infrared (NDIR) system for alcohol detection. In addition, we have tried to miniaturize this system and integrate it with the electric signal system to make a portable apparatus, including the emitter, photodetector, emitter chamber, gas chamber, detector holder, signal amplifier, ADC and display module.