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We investigate a tapered, hybrid plasmonic waveguide which has previouslybeen proposed as an optically efficient near-field transducer (NFT), orcomponent thereof, in several devices which aim to exploit nanofocused light.We numerically analyze how light is transported through the waveguide andultimately focused via effective-mode coupling and taper optimization. Crucialdimensional parameters in this optimization process are identified that are notonly necessary to achieve maximum optical throughput, but also optimum thermalperformance with specific application towards heat-assisted magnetic recording(HAMR). It is shown that existing devices constructed on similar waveguides maybenefit from a heat spreader to avoid deformation of the plasmonic elementwhich we achieve with no cost to the optical efficiency. For HAMR, our designis able to surpass many industry requirements in regard to both optical andthermal efficiency using pertinent figure of merits like 8.5% opticalefficiency.

Optical and thermal analysis of the light-heat conversion process employing an antenna-based hybrid plasmonic waveguide for HAMR