Efficient Plasmonic Transducer for Nanoscale Optical Energy Transfer in Heat-Assisted Magnetic Recording

摘要: This paper presents a near-field plasmonic transducer that efficiently transforms dielectric waveguide mode into suitable plasmon for nanoscale optical energy transfer magnetic recording medium, the application of heat-assisted (HAMR). The proposed is tapered hybrid plasmon-dielectric typically consists two modes. Along taper, one modes approaches cutoff, while other short-range surface couples well medium over nanospot size 28 nm by 38 nm, owing to its relatively uniform and strong longitudinal field component. power coupled SRSP mode, at input, about 62 $\%$ this efficiency preserved along length. in turn with maximum absorption 7.87 . broadband. Even inclusion pole 30 nm away from transducer, 6.44 structure tolerant fabrication misalignments, since metallic, gap layers are all self-aligned. high-efficiency, broadband nature ease fabrication, makes highly HAMR applications, possibly nanofocusing applications.