The Asymmetry Effect on Hybrid Plasmon Modes in Disk@ring Nanoparticle

Here, the characteristics of hybrid plasmon modes of disk@ring nanoparticle were investigated by finite difference time domain simulation method. The change of the distance from the edge of the disk to the center of the ring, the change of the polarization angle, and the number of disks were considered as an asymmetry parameter in the research. The obtained results showed that two kinds of plasmon appear in near-infrared and visible regions, which are related to bonding and anti-bonding modes, respectively. This study can have potential applications in nano and biosensors in the detection of chemical species and threshold excitation of nanolasers in hybrid plasmonic wavelengths.