Solid immersion lens optical head for high-numerical-aperture cover-layered incident near-field recording

Yong Joong Yoon, Cheol Ki Min, Wan Chin Kim, No Cheol Park, Young Pil Park, Tao Hong, Kyunggeun Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

For increasing data recording density and reducing spherical aberration in cover-layered incident near-field recording (NFR) systems, a high-refractive-index cover layer is necessary and the assembly and evaluation technologies of a solid immersion lens (SIL) optical head for a high-numerical-aperture (NA) cover-layered incident NFR system are also required. To assemble a SIL optical head for the high-NA cover-layered incident NFR system, a modified Twyman-Green interferometer is developed. In this paper, we present the design and assembly results for a SIL optical head with a high-refractive-index cover-layered disk. We also compare evaluation results with those of a simulation to confirm the feasibility of the assembly. Through this research, we can improve the effective NA to 1.84, which is the highest NA reported for a cover-layered incident NFR system, and consequently, the data recording capacity per layer can be increased.

Original languageEnglish
Article number03A040
JournalJapanese Journal of Applied Physics
Volume48
Issue number3 PART 2
DOIs
Publication statusPublished - 2009 Mar 1

Fingerprint

numerical aperture
submerging
Lenses
Data recording
near fields
recording
lenses
data recording
assembly
Refractive index
refractivity
Aberrations
Interferometers
evaluation
aberration
interferometers
simulation

All Science Journal Classification (ASJC) codes

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

Cite this

Yoon, Yong Joong ; Min, Cheol Ki ; Kim, Wan Chin ; Park, No Cheol ; Park, Young Pil ; Hong, Tao ; Lee, Kyunggeun. / Solid immersion lens optical head for high-numerical-aperture cover-layered incident near-field recording. In: Japanese Journal of Applied Physics. 2009 ; Vol. 48, No. 3 PART 2.
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Solid immersion lens optical head for high-numerical-aperture cover-layered incident near-field recording. / Yoon, Yong Joong; Min, Cheol Ki; Kim, Wan Chin; Park, No Cheol; Park, Young Pil; Hong, Tao; Lee, Kyunggeun.

In: Japanese Journal of Applied Physics, Vol. 48, No. 3 PART 2, 03A040, 01.03.2009.

Research output: Contribution to journalArticle

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