Journal
OPTICS LETTERS
Volume 46, Issue 15, Pages 3741-3744Publisher
Optica Publishing Group
DOI: 10.1364/OL.428870
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Funding
- Shenzhen University [2019075]
- Science and Technology Innovation Commission of Shenzhen grants Shenzhen Peacock Plan [JCYJ20200109114018750, KQJSCX20170727100838364, KQTD20170330110444030, ZDSYS201703031605029]
- Leadership of Guangdong Province Program [00201505]
- Natural Science Foundation of Guangdong Province [2016A030312010, 2020A1515011185]
- National Natural Science Foundation of China [11604218, 11947017, 61935013, 61975133, U1701661]
- National Key Research and Development Program of China [2018YFB1801801]
- Guangdong Major Project of Basic and Applied Basic Research [2020B0301030009]
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This study demonstrated a meta-device capable of dynamically switching between 2D edge-enhanced imaging and bright-field imaging, functioning as either a high-pass or low-pass filter in the Fourier frequency spectrum depending on its phase state. The meta-device features an ultra-thin architecture and polarization-insensitive dynamically switchable functionality, with potential applications in integrated biomedical imaging and defect detection.
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 4f 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. (C) 2021 Optical Society of America
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