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物理学报. 2010, 59(2): 958-963.
doi: 10.7498/aps.59.958.
亚波长金属聚焦透镜结构参数的优化与分析
- 收稿日期: 2008-12-15
- 修回日期: 2009-05-04
- 刊出日期: 2010-01-05
English Abstract
Optimization and analysis of the structural parameters of subwavelength metal focusing lens
- Received Date:
15 December 2008
- Accepted Date:
04 May 2009
- Published Online:
05 January 2010
Abstract: The methods for improving the focusing properties of subwavelength metallic lens by optimizing the groove width and depth of the structure simultaneously are presented. We investigate how the variations of the width and depth of the groove affect the half width at half maximum of the focus, intensity, normal focusing efficiency of the focal spot and the focal length, based on the finite-difference and time-domain method. The optimum design methods of metal lens are put forth through discussing the focusing regularity and physical mechanism, which can provide a theoretical basis for realizing the nano-focusing and flexible manipulation of light wave based on metallic lens.
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Keywords:
- surface plasmon polaritons /
- subwavelength /
- focus
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