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22 January 2010 Optical characteristics of surface plasmon resonance based on ZnO and metallic nanograting structures
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Abstract
We proposed the grating coupled surface plasmon resonance (GC-SPR) sensors using ZnO and metallic nanograting structures to enhance the sensitivity of an SPR sensor. The GC-SPR sensors were analyzed using the finitedifference time-domain method. The optimum resonance angles of 49 and 55.5 degrees are obtained in the 150 nm wide grating structure with a period of 300 nm for the ZnO thickness of 30 and 50 nm, respectively. Here, an enhanced evanescent field is obtained due to the surface plasmon on the edge of the bandgap when the ZnO and metallic grating structures are used to excite the surface plasmon.
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Doo Gun Kim, Seon Hoon Kim, Hyun Chul Ki, Hyo Jin Kim, Hang Ju Ko, Myung-Soo Han, Swook Hann, Tae Un Kim, Hwe Jong Kim, Geum-Yoon Oh, and Young Wan Choi "Optical characteristics of surface plasmon resonance based on ZnO and metallic nanograting structures", Proc. SPIE 7608, Quantum Sensing and Nanophotonic Devices VII, 76081H (22 January 2010); https://doi.org/10.1117/12.841444
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