An efficient and compact method of introducing light into a magnetic recording head
for use in Heat Assisted Magnetic Recording (HAMR) is proposed. The technique uses a polymer
waveguide to source light into a novel metallic structure consisting of a sub-wavelength C-aperture
waveguide with a 90° bend and a tapered section. The structure is modeled using Finite
Difference Time Domain (FDTD) simulations and it is shown that the 90° bend allows for low loss
near-field optical access into a conventional magnetic recording head while the tapered C-waveguide
allows for maximum input coupling and a minimum spot size at the recording media.
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