薄膜
衍射
材料科学
光学
波长
数值孔径
极限(数学)
激光器
光电子学
光盘
光圈(计算机存储器)
载波噪声比
信噪比(成像)
物理
纳米技术
数学
声学
数学分析
作者
Junji Tominaga,Takashi Nakano,Nobufumi Atoda
摘要
A technique for recording and retrieving small marks beyond the optical diffraction limit was proposed. The basic experiment with this technique was also carried out at a constant linear velocity of 2.0 m/s, rotating a disk with a multi-layered structure of Sb and GeSbTe, which were separated by a thin film of SiN. By use of the optically nonlinear property of the Sb thin film, carrier to noise ratio of more than 10 dB was obtained from recorded marks of 90 nm, using an optical system with the laser wavelength of 686 nm and a numerical aperture of 0.6.
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