Journals >Opto-Electronic Science
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2025
Volume: 4 Issue 3
2 Article(s)
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Research Articles
Design, setup, and facilitation of the speckle structured illumination endoscopic system
Elizabeth Abraham, and Zhaowei Liu
Structured illumination, a wide-field imaging approach used in microscopy to enhance image resolution beyond the system's diffraction limits, is a well-studied technique that has gained significant traction over the last two decades. However, when translated to endoscopic systems, severe deformations of illuminatioStructured illumination, a wide-field imaging approach used in microscopy to enhance image resolution beyond the system's diffraction limits, is a well-studied technique that has gained significant traction over the last two decades. However, when translated to endoscopic systems, severe deformations of illumination patterns occur due to the large depth of field (DOF) and the 3D nature of the targets, introducing significant implementation challenges. Hence, this study explores a speckle-based system that best suits endoscopic practices to enhance image resolution by using random illumination patterns. The study presents a prototypic model of an endoscopic add-on, its design, and fabrication facilitated by using the speckle structured illumination endoscopic (SSIE) system. The imaging results of the SSIE are explained on a colon phantom model at different imaging planes with a wide field of view (FOV) and DOF. The obtained imaging metrics are elucidated and compared with state-of-the-art (SOA) high-resolution endoscopic techniques. Moreover, the potential for a clinical translation of the prototypic SSIE model is also explored in this work. The incorporation of the add-on and its subsequent results on the colon phantom model could potentially pave the way for its successful integration and use in futuristic clinical endoscopic trials..
Opto-Electronic Science
- Publication Date: Mar. 17, 2025
- Vol. 4, Issue 3, 240022 (2025)
Spin-dependent amplitude and phase modulation with multifold interferences via single-layer diatomic all-silicon metasurfaces
Hui Li, Chenhui Zhao, Jie Li, Hang Xu... and Jianquan Yao|Show fewer author(s)
Diatomic metasurfaces designed for interferometric mechanisms possess significant potential for the multidimensional manipulation of electromagnetic waves, including control over amplitude, phase, frequency, and polarization. Geometric phase profiles with spin-selective properties are commonly associated with wavefrontDiatomic metasurfaces designed for interferometric mechanisms possess significant potential for the multidimensional manipulation of electromagnetic waves, including control over amplitude, phase, frequency, and polarization. Geometric phase profiles with spin-selective properties are commonly associated with wavefront modulation, allowing the implementation of conjugate strategies within orthogonal circularly polarized channels. Simultaneous control of these characteristics in a single-layered diatomic metasurface will be an apparent technological extension. Here, spin-selective modulation of terahertz (THz) beams is realized by assembling a pair of meta-atoms with birefringent effects. The distinct modulation functions arise from geometric phase profiles characterized by multiple rotational properties, which introduce independent parametric factors that elucidate their physical significance. By arranging the key parameters, the proposed design strategy can be employed to realize independent amplitude and phase manipulation. A series of THz metasurface samples with specific modulation functions are characterized, experimentally demonstrating the accuracy of on-demand manipulation. This research paves the way for all-silicon meta-optics that may have great potential in imaging, sensing and detection..
Opto-Electronic Science
- Publication Date: Mar. 17, 2025
- Vol. 4, Issue 3, 240025 (2025)
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