Journal
OPTICS LETTERS
Volume 47, Issue 18, Pages 4814-4817Publisher
Optica Publishing Group
DOI: 10.1364/OL.469518
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Funding
- National Key Research and Development Program of China [2021YFA1400601]
- National Science Fund for Distinguished Young Scholars [11925403]
- National Natural Science Foundation of China [11904181, 11904183, 11974193, 12104243, 12122406, 12192253]
- Natural Science Foundation of Tianjin City for Distinguished Young Scientists [18JCJQJC45700]
- China Postdoctoral Science Foundation [2018M640224, 2021M690084]
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This study utilizes dielectric bilayer polyatomic metasurfaces to achieve the maximum optical intrinsic chirality over a wide bandwidth range, providing a new method for spin-selective optical wave manipulation.
Optical chirality plays a key role in optical biosensing and spin-selective optical field manipulation. However, the maximum optical intrinsic chirality, which is represented by near-unity circular dichroism (CD), is yet to be achieved in a wide bandwidth range based on nanostructures. Here, we utilize dielectric bilayer polyatomic metasurfaces to realize the maximum optical intrinsic chirality over a wide bandwidth range. The CD efficiency of the two designed metasurfaces with opposite chirality is 99.9% at 1350 nm and over 98% from 1340 nm to 1361 nm. Our work provides a straightforward and powerful method for the realization of maximum optical intrinsic chirality, which has great potential in spin-selective optical wave manipulation. (C) 2022 Optica Publishing Group
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