Electrically-switched differential microscopy based on computing liquid-crystal platforms
Author:
Liu Shuoqing1, Zheng Dandan1, Yang Qiang1, Chen Shizhen1ORCID, Wen Shuangchun1, Luo Hailu1ORCID
Affiliation:
1. Key Laboratory of Micro-/Nano-Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics , Hunan University , Changsha 410082 , China
Abstract
Abstract
Detection of transparent phase specimens especially biological cells with desired contrasts is of great importance in visual display and medical diagnosis. Due to the pure-phase nature, conventional detection approaches may damage samples or require complex operations. Computing liquid crystal (LC) is a thin and flat optical element with excellent capability in optical field modulation, which gives a feasible way to this issue from the perspective of analog optical computing. We here propose and experimentally implement an electrically switched two-dimensional (2D) differential microscopy based on computing LC platforms. The Pancharatnam–Berry phase LC polarization grating induces light’s spin separation to promote the 2D differential operation. Using the electrically tunable LC plate as the system phase retardance provider, the detecting mode can be flexibly switched from bright-field images to edge-enhanced images with desired contrasts. Remarkably, owing to the wavelength-independent feature closely related to the geometric phases, our proposed scheme is demonstrated to be applicable to the multi-wavelength microscopy imaging. These results open avenues to form real-time all-optical image processing and may facilitate multifunctional differential microscopy.
Funder
Postgraduate Scientific Research Innovation Project of Hunan Province Fundamental Research Funds for the Central Universities Natural Science Foundation of Hunan Province National Natural Science Foundation of China
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
Reference50 articles.
1. F. Zernike, “How I discovered phase contrast,” Science, vol. 121, no. 3141, pp. 345–349, 1955. https://doi.org/10.1126/science.121.3141.345. 2. C. Preza, D. L. Snyder, and J.-A. Conchello, “Theoretical development and experimental evaluation of imaging models for differential-interference-contrast microscopy,” J. Opt. Soc. Am. A, vol. 16, no. 9, pp. 2185–2199, 1999. https://doi.org/10.1364/josaa.16.002185. 3. Y. Cotte, et al.., “Marker-free phase nanoscopy,” Nat. Photonics, vol. 7, no. 2, pp. 113–117, 2013. https://doi.org/10.1038/nphoton.2012.329. 4. C. Y. J. Hémonnot and S. Köster, “Imaging of biological materials and cells by X-ray scattering and diffraction,” ACS Nano, vol. 11, no. 9, pp. 8542–8559, 2017. https://doi.org/10.1021/acsnano.7b03447. 5. Y. Park, C. Depeursinge, and G. Popescu, “Quantitative phase imaging in biomedicine,” Nat. Photonics, vol. 12, no. 10, pp. 578–589, 2018. https://doi.org/10.1038/s41566-018-0253-x.
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