Nanooptical characteristics of double-sided grating structure with nanoslit aperture for heat assisted magnetic recording

Dong Soo Lim, Hyun Suk Oh, Young-Joo Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In heat assisted magnetic recording (HAMR) technology, it is required that the light delivery system has both high near-field optical intensity with small spot size and easy integration with a magnetic head. To satisfy these requirements, a grating structure combined with a nanoslit aperture is proposed and designed using a finite differential time domain (FDTD) simulation. Since the surface plasmon polaritons are excited by the grating structure, and the near-field transmitted light is confined locally near the lower grating structure in the exit plane, the near-field optical intensity of light that penetrated through the nanoslit aperture of the asymmetric double-sided grating structure increased 10-fold compared with that of light penetrating through the nanoslit aperture without the grating structure. In addition, the spot size obtained using this proposed grating structure is reduced to 36% of that obtained using nanoslit aperture without the grating structure.

Original languageEnglish
Article number03A060
JournalJapanese journal of applied physics
Volume48
Issue number3 PART 2
DOIs
Publication statusPublished - 2009 Mar 1

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Magnetic recording
magnetic recording
apertures
gratings
heat
near fields
Magnetic heads
Hot Temperature
polaritons
delivery
requirements

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "In heat assisted magnetic recording (HAMR) technology, it is required that the light delivery system has both high near-field optical intensity with small spot size and easy integration with a magnetic head. To satisfy these requirements, a grating structure combined with a nanoslit aperture is proposed and designed using a finite differential time domain (FDTD) simulation. Since the surface plasmon polaritons are excited by the grating structure, and the near-field transmitted light is confined locally near the lower grating structure in the exit plane, the near-field optical intensity of light that penetrated through the nanoslit aperture of the asymmetric double-sided grating structure increased 10-fold compared with that of light penetrating through the nanoslit aperture without the grating structure. In addition, the spot size obtained using this proposed grating structure is reduced to 36{\%} of that obtained using nanoslit aperture without the grating structure.",
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Nanooptical characteristics of double-sided grating structure with nanoslit aperture for heat assisted magnetic recording. / Lim, Dong Soo; Oh, Hyun Suk; Kim, Young-Joo.

In: Japanese journal of applied physics, Vol. 48, No. 3 PART 2, 03A060, 01.03.2009.

Research output: Contribution to journalArticle

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