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Imaging photonic crystals using hemispherical digital condensers and phase-recovery techniques

机译:使用半球形数字冷凝器和相恢复技术成像光子晶体

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We describe experiments where Fourier ptychographic microscopy (FPM) and dual-space microscopy (DSM) are implemented for imaging photonic crystals using a hemispherical digital condenser (HDC). Phase-recovery imaging simulations show that both techniques should be able to image photonic crystals with a period below the Rayleigh resolution limit. However, after processing the experimental images using both phase-recovery algorithms, we found that DSM can, but FPM cannot, image periodic structures with a period below the diffraction limit. We studied the origin of this apparent contradiction between simulations and experiments, and we concluded that the occurrence of unwanted reflections in the HDC is the source of the apparent failure of FPM. We thereafter solved the problem of reflections by using a single-directional illumination source and showed that FPM can image photonic crystals with a period below the Rayleigh resolution limit. (C) 2018 Optical Society of America.
机译:我们描述了傅里叶PTYCHOGURARACHIOS(FPM)和双空间显微镜(DSM)的实验用于使用半球形数字冷凝器(HDC)成像光子晶体。 相位恢复成像模拟表明,两种技术应该能够在瑞利分辨率极限以下的时间内进行图像光子晶体。 然而,在使用两种相位恢复算法处理实验图像之后,我们发现DSM可以,但是FPM不能,图像周期结构具有低于衍射极限的时段。 我们研究了模拟和实验之间这一明显矛盾的起源,我们得出结论,HDC中不需要的反射的发生是FPM明显失败的来源。 然后,我们通过使用单向照明源来解决反射问题,并显示FPM可以通过低于瑞利分辨率极限的时段图像的光子晶体。 (c)2018年光学学会。

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