Two-dimensional optical spatial differentiation and high-contrast imaging

• 作者: Junxiao Zhou Haoliang Qian Junxiang Zhao Min Tang Qianyi Wu Ming Lei Hailu Luo Shuangchun Wen Shaochen Chen Zhaowei Liu
• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 174-181
• 页数: 8页
• 语种: 英文
• DOI: 10.1093/nsr/nwaa176

摘要

Optical analog signal processing technology has been widely studied and applied in a variety of science and engineering fields,with the advantages of overcoming the low-speed and high-power consumption associated with its digital counterparts.Much attention has been given to emerging metasurface technology in the field of optical imaging and processing systems.Here,we demonstrate,for the first time,broadband two-dimensional spatial differentiation and high-contrast edge imaging based on a dielectric metasurface across the whole visible spectrum.This edge detection method works for both intensity and phase objects simply by inserting the metasurface into a commercial optical microscope.This highly efficient metasurface performing a basic optical differentiation operation opens up new opportunities in applications of fast,compactible and power-efficient ultrathin devices for data processing and biological imaging.