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Proceedings Paper

Beam shaping with high-NA cylindrical vector beam illumination in SIL systems
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Paper Abstract

In solid immersion lens (SIL) system, both propagating waves and evanescent waves contribute to the total field strength with different properties. By using diffractive optical element to modify the cylindrical vector incident beam, we study how the field strength changes when propagating (evanescent) waves are balanced against each other and the evanescent (propagating) waves dominate the field strength. The simulation results show that for radially polarized incident beam, the rate of slope of axial field strength v.s transverse field strength by evanescent waves contribution is greater than that by propagating waves contribution. With general cylindrical vector incident beams, increasing (the rotation angle of polarization from the radial direction) will also make the axial field strength decrease while the variation of the transverse field strength is small. These methods can be used to control the aspect ratio of three dimensions storage dot, which may find applications in near field optical data storage system.

Paper Details

Date Published: 29 September 2004
PDF: 12 pages
Proc. SPIE 5525, Laser Beam Shaping V, (29 September 2004); doi: 10.1117/12.559301
Show Author Affiliations
Yiqiong Zhao, Univ. of Science and Technology of China (China)
Qiwen Zhan, Univ. of Dayton (United States)
Yong-Ping Li, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 5525:
Laser Beam Shaping V
Fred M. Dickey; David L. Shealy, Editor(s)

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