Design of Plasmonic Cross Antennas for Generating Circularly Polarization in Particle Media

摘要

All-optical magnetic recording with circularly polarized light has been studied for developing ultra-high speed recording. In this paper, circularly polarized light is generated in bit-patterned media by illuminating linearly polarized light to plasmonic asymmetric cross antennas with and without a beak. Considering the antenna with a beak, the degree of the circular polarization in the center particle becomes high value, and the difference in the intensity between the center and the neighbor media becomes bigger.