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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 18946–18954

Integrated head design using a nanobeak antenna for thermally assisted magnetic recording

Takuya Matsumoto, Fumiko Akagi, Masafumi Mochizuki, Harukazu Miyamoto, and Barry Stipe  »View Author Affiliations


Optics Express, Vol. 20, Issue 17, pp. 18946-18954 (2012)
http://dx.doi.org/10.1364/OE.20.018946


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Abstract

We propose a near-field optical transducer using a triangular antenna and a thin film structure (wing) to efficiently generate an optical near-field near a magnetic head. A finite-difference time-domain calculation showed that the near-field was efficiently generated at the apex of the antenna when the dimensions of the wing were optimized for efficient delivery of the surface plasmon excited on the wing to the antenna. The calculated light utilization efficiency (ratio between the absorbed power in the recording medium and the input power) was 8%. The temperature distribution on the medium, magnetic field distribution, and magnetization pattern were calculated; the proposed recording head may be capable of an areal recording density of 2.5 Tb/in.2.

© 2012 OSA

OCIS Codes
(230.3810) Optical devices : Magneto-optic systems
(210.4245) Optical data storage : Near-field optical recording
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optical Data Storage

History
Original Manuscript: June 6, 2012
Revised Manuscript: July 17, 2012
Manuscript Accepted: July 24, 2012
Published: August 2, 2012

Virtual Issues
August 24, 2012 Spotlight on Optics

Citation
Takuya Matsumoto, Fumiko Akagi, Masafumi Mochizuki, Harukazu Miyamoto, and Barry Stipe, "Integrated head design using a nanobeak antenna for thermally assisted magnetic recording," Opt. Express 20, 18946-18954 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-17-18946


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