EFFECTS OF DIFFERENT ASPECT RATIOS AND JUNCTION LENGTHS ON THE COUPLED PLASMON GOLD NANOROD DIMERS

• DOI: 10.37572/EdArt_3006213612

• Palavras-chave: AuNR dimer, Figure of merit, Bulk Sensitivity, Perfectly matched layer

• Keywords: AuNR dimer, Figure of merit, Bulk Sensitivity, Perfectly matched layer

• Abstract:

  We have explored the optical behaviour in dimmer of gold nanorod (AuNR) bridge by thin silica cylinder to sub-nanometre regime. To probe this model, Computational simulations were carried out to investigate the nanorod surface which was divided into small tetrahedral mesh with finer size. Furthermore, perfectly matched layer (PML) around the nanorod surface was applied to avoid any reflection artifacts on the simulation. The amplitude of the background oscillating field was one (1) Vm−1. Our results reveal that an increase in aspect ratio causes a red shift in dimer connected mode, leading to significantly higher sensitivity 717 nm/RIU and figure of merit 16.9 compared to a single dimer having 300 nm/RIU sensitivity with similar dimensions. These findings suggest that using end to end linked nanoscale structures could significantly play an important role in tuning far field spectral responses of plasmonic metal nanostructures for applications in LSPR sensing.

• Número de páginas: 12