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Photonic Spin-Multiplexing Metasurface for Switchable Spiral Phase Contrast Imaging
journal contribution
posted on 2020-03-10, 19:45 authored by Pengcheng Huo, Cheng Zhang, Wenqi Zhu, Mingze Liu, Song Zhang, Si Zhang, Lu Chen, Henri J. Lezec, Amit Agrawal, Yanqing Lu, Ting XuAs the two most representative operation
modes in an optical imaging
system, bright-field imaging and phase contrast imaging can extract
different morphological information on an object. Developing a miniature
and low-cost system capable of switching between these two imaging
modes is thus very attractive for a number of applications, such as
biomedical imaging. Here, we propose and demonstrate that a Fourier
transform setup incorporating an all-dielectric metasurface can perform
a two-dimensional spatial differentiation operation and thus achieve
isotropic edge detection. In addition, the metasurface can provide
two spin-dependent, uncorrelated phase profiles across the entire
visible spectrum. Therefore, based on the spin-state of incident light,
the system can be used for either diffraction-limited bright-field
imaging or isotropic edge-enhanced phase contrast imaging. Combined
with the advantages of planar architecture and ultrathin thickness
of the metasurface, we envision this approach may open new vistas
in the very interdisciplinary field of imaging and microscopy.
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Keywords
edge detectionphase contrast imagingdifferentiation operationedge-enhanced phase contrast imagingall-dielectric metasurfaceultrathin thicknessdiffraction-limited bright-field imagingSwitchable Spiral Phase Contrast Imaginguncorrelated phase profilesbright-field imagingimaging modesincident lightPhotonic Spin-Multiplexing Metasurfacerepresentative operation modesinterdisciplinary fieldimaging system
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