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Applied Optics

Applied Optics


  • Vol. 43, Iss. 15 — May. 20, 2004
  • pp: 3085–3096

Generation of nanosized optical beams by use of butted gratings with small numbers of periods

Shin-ya Hasegawa and Fumihiro Tawa  »View Author Affiliations

Applied Optics, Vol. 43, Issue 15, pp. 3085-3096 (2004)

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We have devised an optical high-throughput nanosized beam-generating structure consisting of butted gratings with small numbers of periods. We analyzed the structure of these grating by the transverse resonance method. We then demonstrated that it is possible to achieve a beam spot of 45 nm × 60 nm (FWHM) with this structure for the optical heads used in ultrahigh-density recording, such as those used in laser-assisted magnetic recording storage.

© 2004 Optical Society of America

OCIS Codes
(210.0210) Optical data storage : Optical data storage
(210.3810) Optical data storage : Magneto-optic systems
(230.0230) Optical devices : Optical devices
(230.1950) Optical devices : Diffraction gratings

Original Manuscript: August 22, 2003
Revised Manuscript: January 12, 2004
Published: May 20, 2004

Shin-ya Hasegawa and Fumihiro Tawa, "Generation of nanosized optical beams by use of butted gratings with small numbers of periods," Appl. Opt. 43, 3085-3096 (2004)

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