Abstract
Edge-enhanced imaging and bright-field imaging extract different morphological information from an object, and hence a system capable of switching dynamically between them is of vital importance for various applications. By incorporating an elaborately designed meta-device with a ${{4}}f$ imaging system, we demonstrate dynamic switching between 2D edge-enhanced imaging and bright-field imaging. The dynamically switchable characteristic results from the composed phase-change material meta-atoms, which are optimized to provide two independent phase profiles in amorphous and crystalline states. For dynamically switchable imaging, the meta-device functions as either a high-pass or a low-pass filter in the Fourier frequency spectrum, relying on its phase state. In addition, the dynamically switchable imaging is polarization independent. The proposed meta-device owns ultra-thin architecture and polarization-insensitive dynamically switchable functionality, holding potential applications in integrated biomedical imaging and defect detection.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Guanghao Chen, Junxiao Zhou, Steven Edward Bopp, Junxiang Zhao, and Zhaowei Liu
Opt. Lett. 47(16) 4040-4043 (2022)
Chuanchuan Ding, Guanghao Rui, Bing Gu, Qiwen Zhan, and Yiping Cui
Opt. Lett. 46(10) 2525-2528 (2021)
Titao Xiao, Hua Yang, Qiang Yang, Dingyu Xu, Ruisi Wang, Shizhen Chen, and Hailu Luo
Opt. Lett. 47(4) 925-928 (2022)