Browse > Article
http://dx.doi.org/10.3795/KSME-A.2004.28.3.245

Optical Cap Sensor for Magneto-Optic Near-Field Recording  

Yoon, Yong-Joong (연세대학교 대학원 기계공학과)
Park, Jae-Hyuk (연세대학교 정보저장협동과정)
Park, No-Cheol (연세대학교 기계공학과)
Park, Young-Pil (연세대학교 대학원 정보저장협동과정)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.3, 2004 , pp. 245-250 More about this Journal
Abstract
This paper proposes a new method of measuring an air interface distance between a solid immersion lens(SIL) applied magneto-optic technology and the disk surface. For applying near-field recording (NFR) technology to the magneto-optic storage devices for the next generation, it is positively necessary to maintain the small air gap under about 100㎚. We design an apparatus that consists of some optical components such as a prism, a polarizer and an analyzer. By using the Fresnel reflection coefficient equation, Jones matrices calculation and Malus's law, we establish a mathematical model for understanding the characteristics of the system. The simulations are based on the mathematical model and through the simulation results which is made with various cases we can estimate the performance of the new optical gap sensor system. Experimental results, which are also based on the mathematical model for specific cases, are in good agreement with simulated ones and demonstrate the possibility as the new optical gap sensor.
Keywords
Magneto Optical Recording; Near-Field Recording; Polarized Light; Optical Gap Sensor;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ichimura, I., Osato, K., Maeda, F., Owa, H. and H. Ooki, 1995, 'High Density Optical Disk System Using a Solid Immersion Lens,' SPIE, 2514, pp. 176-181.
2 Harland, G. Tompkins, 1993, A User's Guide to Ellipsometry, (Academic Press).
3 Azzam, R.M.A. and Bashara, N.M., 1977, Elliposometry and Polarized Light(Holland Publishing Co.).
4 Heavens, O.S., 1965, Optical Properties of Thin Solid Films(Dover Publications).
5 Edware Collett, 1992, Polarized Light Fundamentals and Applications(Marcel Dekker)
6 Imanishi, S.and Ishimoto,T., 2000, 'Near-Field Optical Recording of 1.36 Numerical Aperture,' Jpn. J.Appl. Phys. 39, pp. 962-967.   DOI
7 Eugene Hecht, 2002, Optics $4^th-ed$(Addison Wesley Longman).