手性(物理)
圆二色性
超材料
平面的
物理
螺旋度
极化(电化学)
圆极化
双折射
镜像对称
量子
光电子学
光学
量子力学
手征对称破缺
对称性破坏
化学
结晶学
微带线
物理化学
计算机图形学(图像)
计算机科学
Nambu–Jona Lasinio模型
作者
Tan Shi,Zi‐Lan Deng,GUANGZHOU GENG,Yixuan Zeng,Guangwei Hu,Junjie Li,Junjie Li,Cheng‐Wei Qiu,Andrea Alù,Xiangping Li,Xiangping Li
出处
期刊:Research Square - Research Square
日期:2022-01-26
被引量:4
标识
DOI:10.21203/rs.3.rs-1194502/v1
摘要
Abstract Optical metasurfaces with high-Q chiral resonances can boost light-matter interaction for various applications of chiral response for ultrathin, active, and nonlinear metadevices. Usually, such metasurfaces require sophisticated depth-resolved nanofabrication to realize subwavelength stereo-nanostructures, posing overwhelming challenges, especially in the short-wavelength range. Here, we suggest a novel planarized design of chiral metasurfaces supporting bound states in the continuum (BICs), and demonstrate experimentally chiroptical responses with record-high Q-factors (Q=390) and near-perfect circular dichroism (CD=0.93) at optical frequencies. The symmetry-reduced meta-atoms are highly birefringent and support winding elliptical eigen-polarizations with opposite helicity surrounding the BIC polarization singularity, providing a convenient way for achieving maximal planar chirality tuned by either broken in-plane symmetry or changing illumination direction. Such sharply resonant chirality realized in planar metasurfaces promises various practical applications in classical and quantum optics including chiral sensing, enantiomer selection, and chiral quantum emitters.
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