Superresolution imaging via superoscillation focusing of a radially polarized beam
Superresolution imaging via superoscillation focusing of a radially polarized beam
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DOI：
10.1364/optica.5.000086
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发表时间：
2018-02-20
期刊：
影响因子：
10.4
通讯作者：
Sato, Shunichi
中科院分区：
文献类型：
--
作者：
Kozawa, Yuichi;Matsunaga, Daichi;Sato, Shunichi
超振荡现象产生的振荡比系统中最快的傅立叶分量更快，可能形成一个尺寸低于衍射极限的局部“热点”。我们证明了通过控制入射光束的大小，径向极化的拉盖尔-高斯模式具有形成超振荡点的固有能力。我们对此进行了详细的数值和实验研究。我们的数值模拟预测，横向分辨率接近100纳米的实际共聚焦激光扫描显微镜与可见光是可能的。实验证明，超振荡聚焦可以显著提高荧光成像的空间分辨率。(c)根据OSA开放获取出版协议的条款，2018年美国光学学会
The phenomenon of superoscillation produces oscillations that are faster than the fastest Fourier component of a system, potentially forming a local "hot spot" with a size below the diffraction limit. We show that a radially polarized Laguerre-Gaussian mode has the inherent ability to form superoscillation spots simply by controlling the incident beam size. We investigate this in detail, both numerically and experimentally. Our numerical simulations predict that lateral resolutions close to 100 nm are possible for practical confocal laser scanning microscopy with visible light. We demonstrate experimentally that superoscillation focusing can offer significant spatial resolution improvements for fluorescence imaging. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement