Fabrication and optical characteristics of a hemi-paraboloidal solid immersion mirror and designing of an optical head with the mirror

A hemi-paraboloidal solid immersion mirror is successfully fabricated with the ELID (electrolytic in-process dressing) grinding technology and the spot size obtained was 150% of that for diffraction limited processes. Small sized optical head would be possible with the HP-SIM, which size is comparable to that of a magnetic head for HDDs.