Novel cover-layer-incident dual-layer near-field recording optics using hemispherical solid-immersion-lens

被引：2
|
作者：
Kim, WC [1 ]
Choi, H [1 ]
Song, T [1 ]
Park, NC [1 ]
Park, YP [1 ]
Kim, YJ [1 ]
机构：
[1] Yonsei Univ, Ctr Informat Storage Dev, Seoul 120749, South Korea
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 2B期
关键词：
near-field recording; hemispherical solid immersion lens; dual-layer near-field recording; cover layer; numerical aperture; air-gap-induced aberrations;
D O I：
10.1143/JJAP.45.1363
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A novel for the design optics for using cover layer-incident dual-layer near-field recording (NFR) is proposed. Using two aplanatic positions of a hemispherical solid immersion lens (HMS), dual-layer NFR optics is designed and optimized. To achieve a high system numerical aperture (NA) of 1.45 for the dual recording layers, a prefocusing lens having NA of 0.7 and a solid immersion lens (SIL) with a refractive index of 2.086 are used. Critical spherical aberrations caused by variations in thickness and chromatic aberrations are effectively suppressed by zoom optics, an additional aspheric lens surface, and a diffractive optical element (DOE). The gap-induced aberration of the designed NFR optics is also investigated.
引用
收藏
页码：1363 / 1365
页数：3
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