The Optical Characteristics and Device Applications of Surface Plasmons

• Main Authors: Tzu-Hung Chuang, 莊子弘
• Other Authors: Si-Chen Lee
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/10428751411988285266

碩士 === 國立臺灣大學 === 電子工程學研究所 === 94 === The band diagram of surface plasmons (SPs) on a periodic array of metal holes is investigated in theory and experiment. The extraordinary transmission of various sized holes in a squared array is measured to observe the different surface charge fields under the Bragg scattering of SPs. The dispersion relations of different aspect length to width ratio of rectangular holes are studied to show the interaction among local SPs and its mechanism. Furthermore, a periodic array of metal holes fabricated on the back of a quantum dot infrared photodetector is illustrated to narrow the detecting region of the photodetector. Besides, a remotely coupled surface plasmon (RCSP) is discovered in an Ag/SiO2/Si structure, and the coupling length is determined as well. In addition, a narrow bandwidth and high power infrared emitter are invented by heating the triple layer structure which consists of an SiO2 layer between two Ag films on a Si substrate. The top Ag layer is perforated by periodic holes. Finally, the features of RCSPs are still observable in this plasmonic thermal emitter.