Study of enhanced sensitivity of nanosensors by using gold bowtie nanoparticles

A plasmonic nanosensor is proposed and investigated its sensitivity using the optical properties of plasmonic nanoparticles. To this end, we first consider the nanosensor consisting of bowtie nanoparticles. Then, the nanosensor performance is examined under different factors such as the refractive index of the background environment, the height, and length of the nanoparticles. The proposed bowtie nanoparticles, in this work, are made of gold. The boundary element method is used to simulate the nanosensor. The extinction cross-section is computed in terms of wavelength and the effect of various factors on the resonance wavelength of localized surface plasmon is investigated. It is shown that the nanosensor investigated in this research has a high sensitivity to the changes in the refractive index of the studied sample. The sensitivity of the nanosensor is obtained as 650nm/RIIU. In addition, the required spectral range can be arbitrarily adjusted by the type of nanoparticles.

Automated summary

A plasmonic nanosensor using the optical properties of plasmonic nanoparticles is proposed and examined in this study. The performance of the nanosensor consisting of bowtie nanoparticles is investigated under various factors. Simulations using the boundary element method show that the nanosensor has high sensitivity to changes in the refractive index of the sample, with a sensitivity of 650nm/RIIU. The spectral range can be adjusted by the type of nanoparticles used.