3D mapping of intensity field about the focus of a micrometer-scale parabolic mirror

被引：5
|
作者：
McDonald, Alison [1 ]
McConnell, Gail [1 ]
Cox, David C. [2 ]
Riis, Erling [3 ]
Griffin, Paul F. [3 ]
机构：
[1] Univ Strathclyde, Strathclyde Inst Pharm & Biomed Sci, Glasgow G4 0RE, Lanark, Scotland
[2] Univ Surrey, Adv Technol Inst, Guildford GU2 7XH, Surrey, England
[3] Univ Strathclyde, Dept Phys, SUPA, Glasgow G4 0NG, Lanark, Scotland
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 03期
基金：
英国生物技术与生命科学研究理事会;
关键词：
OPTICAL TWEEZERS; SINGLE; FABRICATION; ATOMS; LIGHT; TRAP; ION;
D O I：
10.1364/OE.23.002375
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on the fabrication and diffraction-limited characterization of parabolic focusing micromirrors. Sub-micron beam waists are measured for mirrors with 10-mu m radius aperture and measured fixed focal lengths in the range from 24 mu m to 36 mu m. Optical characterization of the 3D intensity in the near-field produced when the device is illuminated with collimated light is performed using a modified confocal microscope. Results are compared directly with angular spectrum simulations, yielding strong agreement between experiment and theory, and identifying the competition between diffraction and focusing in the regime probed. (C) 2015 Optical Society of America
引用
收藏
页码：2375 / 2382
页数：8
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