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Proceedings Paper

Fundamentals of excitation and resonance of a near-field transducer in the presence of a conductive magnetic recording medium
Author(s): Jessica R. Piper; Paul C. Hansen; Lambertus Hesselink
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Paper Abstract

Plasmonic Near-Field Transducers (NFTs) find use in Energy-Assisted Magnetic Recording (EAMR) schemes, where a high-anisotropy recording medium is locally heated to the Curie temperature, allowing conventional magnetic recording heads to overcome the high coercivity of the medium. However, coupling efficiency is low, and the conditions for excitation and resonance are poorly understood. In this work, we explore the behavior of a canonical EAMR setup including rectangular dielectric waveguide, elliptic cylinder gold NFT, and conductive planar recording medium. We systematically examine the effects of polarization and angle; spacing between NFT, waveguide, and recording medium; and variations in NFT size and incident wavelength.

Paper Details

Date Published: 28 February 2012
PDF: 8 pages
Proc. SPIE 8255, Physics and Simulation of Optoelectronic Devices XX, 82550P (28 February 2012); doi: 10.1117/12.909477
Show Author Affiliations
Jessica R. Piper, Stanford Univ. (United States)
Paul C. Hansen, Stanford Univ. (United States)
Lambertus Hesselink, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 8255:
Physics and Simulation of Optoelectronic Devices XX
Bernd Witzigmann; Marek Osinski; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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