3D mapping of intensity field about the focus of a micrometer-scale parabolic mirror.
3D mapping of intensity field about the focus of a micrometer-scale parabolic mirror.
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DOI：
10.1364/oe.23.002375
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发表时间：
2014-11
期刊：
影响因子：
3.8
通讯作者：
Alison McDonald;G. McConnell;D. Cox;E. Riis;P. Griffin
中科院分区：
文献类型：
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作者：
Alison McDonald;G. McConnell;D. Cox;E. Riis;P. Griffin
我们报道了抛物面聚焦微镜的制作和衍射极限特性。在24 μm ~ 36 μm的固定焦距范围内，测量了孔径半径为10 μm的反射镜的亚微米束腰。当用准直光照射装置时产生的近场中的3D强度的光学表征使用修改的共聚焦显微镜进行。结果进行了比较，直接与角谱模拟，产生强烈的实验和理论之间的协议，并确定在该制度的衍射和聚焦之间的竞争。
We report on the fabrication and diffraction-limited characterization of parabolic focusing micromirrors. Sub-micron beam waists are measured for mirrors with 10-μm radius aperture and measured fixed focal lengths in the range from 24 μm to 36 μm. 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.