The validity of high-pass angular spectrum filter in solid immersion lens system

• 来源期刊: 中国物理（英文版）
• 关键词: solid immersion lens polarization high-pass filter
• 年，卷（期）: 2005,（8）
• 页码范围: 1585-1590
• 页数: 6页
• 语种: 英文

摘要

The focal field of a solid immersion lens (SIL) system with a high-pass angular spectrum filter is calculated by using a vector method. Numerical results show that for a radially (azimuthally) polarized input field, a high-pass angular spectrum filter can reduce the light-spot (dark-spot) size of the SIL system. For a linearly polarized input field,however, the focal field cannot be optimized and the optical storage density of the SIL system cannot be improved by using a simple high-pass filter, either.