High-Density Near-Field Readout Using Solid Immersion Lens Made of KTaO3Monocrystal
| Autor: | Kimihiro Saito, Takao Kondo, Ariyoshi Nakaoki, Masahiro Sasaura, Minoru Takeda, Motohiro Furuki, Kazuo Fujiura, Masataka Shinoda |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) business.industry Index-matching material General Engineering General Physics and Astronomy Numerical aperture Optics Solid immersion lens Oil immersion Optoelectronics Area density business Water immersion objective Refractive index Immersion lithography |
| Zdroj: | Japanese Journal of Applied Physics. 45:1332-1335 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.1143/jjap.45.1332 |
| Popis: | We developed solid immersion lenses made of a KTaO3 monocrystal. The refractive index of KTaO3 is 2.382 at a wavelength of 405 nm. Using KTaO3 as the raw material of a solid immersion lens, we could design an effective numerical aperture of 2.20. We observed an eye pattern of a 150 GB capacity with a 130 nm track pitch and a 47.6 nm bit length. The areal density is 104.3 Gbit/in.2. |
| Databáze: | OpenAIRE |
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