The validity of high-pass angular spectrum filter in solid immersion lens system
Zheng Chong-Wei (郑崇伟)a, Dai Yu-Xing (戴瑜兴)b
a Department of Physics & Electronic Information Scinece , Wenzhou University, Wenzhou 325027, China; b College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Abstract 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.
Received: 18 November 2004
Revised: 27 April 2005
Accepted manuscript online:
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