Modelling of Flexible Optical Sensor based on Localized Surface Plasmon Resonance

Haoxuan Meng

《International Core Journal of Engineering》 7卷12期 (2021/12) Pp. 663-677

https://doi.org/10.6919/ICJE.202112_7(12).0092

摘要

Noble metallic nanoparticles have various special properties, such as surface plasmon resonance effect, stable chemical properties, and extraordinary biocompatibility, etc. For this reason, recently metal nanoparticles have been of great importance in the field of nano-bio-sensing, near-field lithography, cancer therapy, solar absorption and many others. Among the properties, its localized surface plasmon resonance is of most attractions. Besides, the ability of the excited metal nanoparticles to absorb the incident electromagnetic field and to scatter their electromagnetic field is dramatically enhanced by the resonance. This paper concerns a design of a nanoparticle sensor by simulating metal nanoparticles of different shapes, particle sizes and materials. Through several simulations by COMSOL, we observed that changing the shape of the resonator from sphere to tetrahedron brings absorbance spectrum's red-shift and colour change. Furthermore, while examining the core-shell structure, we can obtain the sensor with higher sensitivity.

關鍵字

Localized surface Plasmon resonance ； metallic nanoparticle ； core-shell structure ； absorbance spectrum ； Mie Theory

參考文獻

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