hesela.devNear-field transducer (NFT)
A near-field transducer is a nanoscale optical structure that couples supplied light into a confined near field, used in HAMR to heat the recording medium.
Do not identify the NFT with the laser or magnetic pole. A prototype-head study combined cathodoluminescence and scattering near-field microscopy; the antenna resonance shifted without the recording medium [1]. Its optical response depends on the measurement environment, not just the isolated antenna geometry. Seagate describes the laser, waveguide and plasmonic antenna in its Mozaic writer [2]; the shipping status refers to that deployed architecture, whose production is separately reported [3], not to every experimental NFT design.
Relations
- related
- hamr, thermal-writability
Citations
- Visualizing the bidirectional optical transfer function for near-field enhancement in waveguide coupled plasmonic transducers, Scientific Reports (2018), doi:10.1038/s41598-018-24061-3; Figures 2-3 and Methods
- Seagate: Gen 2 plasmonic writer; laser, photonic funnel and quantum antenna (vendor technical description)
- Seagate: Mozaic 4+ qualification and production announcement, 3 March 2026 (vendor claim)