Improvement of Super-RENS MO Disk Characteristics by Optimized Super-Resolution Near-Field Structure

Abstract

As a result of applying super-resolution near-field structure to a magneto-optical disk with a non-magnetic mask layer such as a silver oxide light scattering center type mask layer, we could retrieve the signals of below 200-nm mark length. With the improved antimony transparent aperture type mask layer, in this work, we could get the polarized magneto-optical signals as well that we had not been able to obtain by using the previous antimony mask layer. This was well agreed with computer simulation result. Another optimization, such as magnetic layer thickness, dielectric materials and so on, was also investigated for a better magneto-optical disk of super-resolution near-field structure with a silver oxide light scattering center type mask layer.