| Title: |
Fast selective edge-enhanced imaging with topological chiral lamellar superstructures. |
| Authors: |
Chen, Wen1 (AUTHOR), Zhu, Dong1 (AUTHOR), Liu, Si-Jia1 (AUTHOR), Zhang, Yi-Heng1 (AUTHOR), Zhu, Lin1 (AUTHOR), Li, Chao-Yi1 (AUTHOR), Ge, Shi-Jun1 (AUTHOR), Chen, Peng1 (AUTHOR), Zhang, Wan-Long2 (AUTHOR), Yuan, Xiao-Cong2 (AUTHOR), Lu, Yan-Qing1 (AUTHOR) |
| Source: |
National Science Review. Nov2024, Vol. 11 Issue 11, p1-10. 10p. |
| Subject Terms: |
*OPTICAL computing, *VECTOR beams, *POLARITY (Physics), *FEATURE extraction, *ARTIFICIAL intelligence |
| Abstract: |
Edge detection is a fundamental operation for feature extraction in image processing. The all-optical method has aroused growing interest owing to its ultra-fast speed, low energy consumption and parallel computation. However, current optical edge detection methods are generally limited to static devices and fixed functionality. Herein, we propose a fast-switchable scheme based on a ferroelectric liquid crystal topological structure. The self-assembled chiral lamellar superstructure, directed by the azimuthally variant photo-alignment agent, can be dynamically controlled by the polarity of the external electric field and respectively generates the vector beams with nearly orthogonal polarization distribution. Even after thousands of cycles, the horizontal and vertical edges of the object are selectively enhanced with an ultra-fast switching time of ∼57 μs. Broadband edge-enhanced imaging is efficiently demonstrated. This work extends the ingenious building of topological heliconical superstructures and offers an important glimpse into their potential in the emerging frontiers of optical computing for artificial intelligence. [ABSTRACT FROM AUTHOR] |
|
Copyright of National Science Review is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
