Proposal of an optical nonvolatile switch utilizing surface plasmon antenna resonance controlled by giant magnetoresistance

摘要

We propose an operating principle for an optical nonvolatile switch utilizing surface plasmon antenna resonance controlled by giant magnetoresistance. The optical spectra of an array of nanoscale dipole antennas composed of Co/Cu multilayers with parallel and anti-parallel magnetization alignments were estimated by a first-principle calculation and a finite difference time domain electromagnetic field analysis. The extinction efficiency changed more than 40% in the infrared region due to the magnetization alignment, demonstrating its promise as a nonvolatile optical switch.