Stable Fano-like plasmonic resonance: its impact on the reversal of far- and near-field optical binding force

Hamim Mahmud Rivy,M R C Mahdy,Nabila Masud,Ziaur Rahman Jony,Saikat Chandra Das

Figure 2. (a)–(j) The extinction spectra curves of cube-shaped plasmonic nanoparticles for different geometrical configurations when the nanoparticles (Mie range) are half suspended in a lower background medium of refractive index 1.87 (which is the highest possible refractive index for liquid medium). The extinction spectra curves show stable Fano-like resonance for all the geometric configurations. It should be noted that the geometrical configurations are not drawn to scale. For example, in figures (b), (d) the surface to surface distances between the plasmonic nanoparticle dimers and tetramers are 1400 nm.