- 标题
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- 实验方案
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Self-Assembled Asymmetric Microlenses for Four-Dimensional Visual Imaging
摘要： Visual imaging that can extract three-dimensional (3D) space or polarization information on the target is essential in broad sciences and technologies. The simultaneous acquisition of them usually demands expensive equipment and sophisticated operations. Therefore, it is of great significance to exploit convenient approaches for four-dimensional (3D and polarization) visual imaging. Here, we present an efficient solution based on self-assembled asymmetric liquid crystal microlenses, with freely manipulated phase profiles and symmetry-breaking properties. Accordingly, characteristics of multi-focal functionality and polarization selectivity are exhibited, along with the underlying mechanisms. Moreover, with a specific sample featured by radially increased unit sizes and azimuthally varied domain orientations, the discriminability of four-dimensional information is extracted in a single snapshot, via referring to the coordinates of the clearest images. Demultiplexing of depth/polarization information is also demonstrated. This work will unlock a variety of revolutionary apparatuses and lighten extensive applications.
关键词： polarization detection,liquid crystals,visual imaging,microlens array,self-assembly
更新于2025-09-11 14:15:04
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Template-Confined Growth of Ruddlesden-Popper Perovskite Micro-Wire Arrays for Stable Polarized Photodetectors
摘要： The detection of the polarization states of light is of great significance for analysis of biological tissue morphology, image display systems and sensors. Although organic-inorganic hybrid perovskite crystals have excellent photoelectric properties which make them very suitable for the preparation of photodetectors, their application for polarized light detection are hindered by their isotropy and instability. Here, we solved this problem by fabricating stable 2D layered Ruddlesden-Popper perovskite into anisotropic micro-wire arrays with a template-confined method. Based on this anisotropic structure, high performance photodetector with dark current as low as 10-12 A, high responsivity of 3.5 AW-1，detectivity exceeding 1×1015 Jones and fast response time of 4.1 ms for rising and 3.3 ms for decay had been achieved and successfully applied to high-performance polarization detection. More importantly, the device maintained superior performance even after being exposured in an environment of a relative humidity of 60% without encapsulation.
关键词： perovskite,micro-wire arrays,template-confined growth,photodetector,polarization detection
更新于2025-09-11 14:15:04