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Super-Resolution Readout for Magneto-Optical Disk by Optimizing the Deposition Condition of Non-Magnetic Mask Layer

Published online by Cambridge University Press:  21 March 2011

Takayuki Shima ,
Johoo Kim ,
Hiroshi Fuji ,
Nobufumi Atoda  and
Junji Tominaga
Takayuki Shima
Affiliation:
Laboratory for Advanced Optical Technology (LAOTEC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan
Johoo Kim
Affiliation:
Laboratory for Advanced Optical Technology (LAOTEC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan
Hiroshi Fuji
Affiliation:
Advanced Technology Research Laboratories, Sharp Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
Nobufumi Atoda
Affiliation:
Laboratory for Advanced Optical Technology (LAOTEC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan
Junji Tominaga
Affiliation:
Laboratory for Advanced Optical Technology (LAOTEC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan
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Abstract

Super-resolution near-field structure (Super-RENS) was prepared by a heliconwave-plasma sputtering method to improve the disk property that is combined with a magneto-optical (MO) recording disk. Antimony and silver-oxide mask layers were prepared by the method and refractive indices were measured. Recording and retrieving of signals beyond the resolution limit (<370 nm) were achieved for both mask cases. Attempts to optimize the disk structure were also made using a conventional sputtering method. The smallest mark size was around 200 nm and the highest carrier-to-noise ratio (CNR) was 30 dB for 300-nm mark and 22 dB for 250-nm, when using a laser wavelength of 780 nm and a numerical aperture of 0.53. We have found that there is a competing super-resolutional mechanism besides Super-RENS that appears when high readout laser power is applied. This mechanism played rather an important role at least in the mark-size range of 200-370 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 674: Symposia T/U/V – Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics , 2001 , V2.2
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

1. Tominaga, J., Nakano, T. and Atoda, N., Appl. Phys. Lett. 73, 2078(1998).Google Scholar
2. Fuji, H., Tominaga, J., Men, L., Nakano, T., Katayama, H. and Atoda, N., Jpn. J. Appl. Phys. 39, 980(2000).Google Scholar
3. Kim, J., Yamakawa, Y., Fuji, H., Nakano, T., Büchel, D., Tominaga, J. and Atoda, N., Appl. Phys. Lett. 77, 1774(2000).Google Scholar
4. Tominaga, J., Fuji, H., Sato, A., Nakano, T. and Atoda, N., Jpn. J. Appl. Phys. 39, 957(2000).10.1143/JJAP.39.957Google Scholar
5.e.g., Wang, X., Masumoto, H., Someno, Y. and Hirai, T., Thin Solid Films 338, 105(1999).Google Scholar
6. Kim, J., Shima, T., Fuji, H., Nakano, T., Büchel, D., Tominaga, J. and Atoda, N., J. Magn. Soc. Japan 25, 387(2001).Google Scholar
7. Lannin, J.S., Phys. Rev. B 15, 3863(1977).Google Scholar
8. Renucci, J.B., Richter, W., Cardona, M. and Schönherr, E., Phys Status Solidi b 60, 299(1973).Google Scholar
9. Shima, T., Kim, J., Tominaga, J. and Atoda, N., J. Vac. Sci. & Technol. A (in press).Google Scholar
10. Fuji, H., Watanabe, K., Hamamoto, M., Sato, J., Kojima, K., Katayama, H., Kim, J., Shima, T., Nakano, T., Büchel, D., Tominaga, J. and Atoda, N., Abstracts of the 8th Joint MMM-intermag Conference, San Antonio, TX, 2001, BE-01.Google Scholar
11. Kikukawa, T., Kato, T., Shingai, H. and Utsunomiya, H., Abstracts of the Optical Data Storage Topical Meeting, Santa Fe, NM, 2001, TuD1.Google Scholar
12. Silva, T. J. and Schultz, S., SPIE Proceedings 1855, 180(1993).10.1117/12.146375Google Scholar