极化(电化学)
光学
简并能级
各向同性
超材料
厚板
波长
光子晶体
物理
光电子学
地球物理学
量子力学
物理化学
化学
作者
Olivia Y. Long,Cheng Guo,Weiliang Jin,Shanhui Fan
出处
期刊:Physical review applied
[American Physical Society]
日期:2022-02-09
卷期号:17 (2)
被引量:13
标识
DOI:10.1103/physrevapplied.17.024029
摘要
Flat optics has demonstrated great advances in miniaturizing conventional bulky optical elements due to recent developments in metasurface design. Specific applications of such designs include spatial differentiation and the compression of free-space. However, metasurfaces designed for such applications are often polarization-dependent and are designed for a single functionality. In this work, we introduce a polarization-independent metasurface structure by designing guided resonances with degenerate band curvatures in a photonic crystal slab. Our device can perform both free-space compression and spatial differentiation when operated at different frequencies at normal incidence. This work demonstrates the promise of dispersion engineering in metasurface design to create ultrathin devices with polarization-independent functionality.
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