Analysis and Optimization of Refractive Index Sensing of Gold Nanospheroid

YAKUPU Xiayiding, TUERSUN Paerhatijiang, WU Panpan

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Chinese Journal of Light Scattering ›› 2020, Vol. 32 ›› Issue (1) : 40-45. DOI: 10.13883/j.issn1004-5929.202001004
Theories of Light Scattering

Analysis and Optimization of Refractive Index Sensing of Gold Nanospheroid

  • YAKUPU Xiayiding1,2, TUERSUN Paerhatijiang1,2*, WU Panpan1,2
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Abstract

For the application of gold nanoparticles in chemical and biological sensing, finding the shape of gold nanoparticles with high figure of merit has become a research hotspot in recent years. Based on the T-matrix method with the size-dependent dielectric function, the influence of the size of gold nanospheroids on its refractive index sensitivity, linewidth and figure of merit was studied quantitatively in this paper. In order to obtain the best sensing performance, the figure of merit was optimized and the optimal particle size parameters were obtained. The results show that the gold nanospheroids with the minor semi-axis of 11 nm and the major semi-axis of 49 nm has a maximum figure of merit of 6.76. The optimized gold nanospheroids can be treated as potential candidates for chemical and biological sensing. This study provides an important theoretical basis for the application of gold nanospheroids in chemical and biological sensing.

Key words

Gold nanoparticles / T-matrix method / Sensing / Figure of merit / Optimization

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YAKUPU Xiayiding, TUERSUN Paerhatijiang, WU Panpan. Analysis and Optimization of Refractive Index Sensing of Gold Nanospheroid. Chinese Journal of Light Scattering. 2020, 32(1): 40-45 https://doi.org/10.13883/j.issn1004-5929.202001004

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