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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hasegawa, Shin ya Tawa, Fumihiro Odajima, Wataru |
| Copyright Year | 2010 |
| Abstract | A planar near-field optical head with a high optical efficiency of 12.9% (3.2 times higher than that of our previous design) for laser-assisted magnetic recording is described. In this head, a slab-type waveguide with a narrow core is butt-coupled into a one-sided multilayer thin-film stack. Metal cladding is used in the core because of its high optical efficiency due to surface plasmon excitation. To keep production costs low, we use only two layers for the side part, which act as a two-index-step lens that couples light in the side part into a core of the central part. We optimized the parameters of this optical head and recording medium by means of an optical simulator using the finite-difference time-domain method and a thermal simulator. The calculated full width half maximum (FWHM) optical spot size on the recording medium is 24 × 47 nm2 and the thermal spot size is 80 × 88 nm2 (FWHM). |
| Starting Page | 486 |
| Ending Page | 494 |
| Page Count | 9 |
| File Format | |
| ISSN | 13406000 |
| Journal | Optical Review |
| Volume Number | 17 |
| Issue Number | 5 |
| e-ISSN | 13499432 |
| Language | English |
| Publisher | Optical Society of Japan |
| Publisher Date | 2010-10-01 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | optical waveguide laser-assisted magnetic recording near-field optics magnetic recording medium FDTD method Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics |
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