Dual waveguide near field transducer for heat assisted magnetic recording

摘要

A near field transducer (NFT) for heat assisted magnetic recording (HAMR) having a dual waveguide excitation system located adjacent to opposite sides of a plasmonic antenna. The light to one of the waveguides can be passed through a phase shifter so that its electric field is 180 degrees out of phase with that of the other waveguide. In this way, the energy from each of the waveguides can be delivered to the plasmonic antenna in an additive manner while heat-sinking schemes can be implemented in the orthogonal direction for greatly improving the optical efficiency and thermal stability of the NFT.

主权项

1. A near field transducer, comprising:
a plasmonic antenna having first and second opposite sides; a first waveguide located adjacent to the first side; a second waveguide located adjacent to the second side; and a phase shifter, configured to shift an optical phase of the first waveguide relative to the second waveguide.