TY - JOUR
T1 - Solid immersion lens optical head for high-numerical-aperture cover-layered incident near-field recording
AU - Yoon, Yong Joong
AU - Min, Cheol Ki
AU - Kim, Wan Chin
AU - Park, No Cheol
AU - Park, Young Pil
AU - Hong, Tao
AU - Lee, Kyunggeun
PY - 2009/3
Y1 - 2009/3
N2 - 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.
AB - 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.
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U2 - 10.1143/JJAP.48.03A040
DO - 10.1143/JJAP.48.03A040
M3 - Article
AN - SCOPUS:77952505326
SN - 0021-4922
VL - 48
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 3 PART 2
M1 - 03A040
ER -