Liquid-crystal-loaded chiral metasurfaces for reconfigurable multiband spin-selective light absorption.
Liquid-crystal-loaded chiral metasurfaces for reconfigurable multiband spin-selective light absorption.
复制标题
DOI：
10.1364/oe.26.025305
复制
发表时间：
2018-09
期刊：
影响因子：
3.8
通讯作者：
D. Xiao;Y. Liu;Shengtao Yin;Jianxun Liu;W. Ji;B. Wang;D. Luo;Guixin Li;X. W. Sun
中科院分区：
文献类型：
--
作者：
D. Xiao;Y. Liu;Shengtao Yin;Jianxun Liu;W. Ji;B. Wang;D. Luo;Guixin Li;X. W. Sun
光吸收在许多光子器件中起着关键作用。在这项工作中，我们从理论上证明了多波段的圆偏振光可以自旋选择性地吸收与单层超颖表面。左右手圆偏振光的吸收效率之差可达40%。这种巨大的手旋光效应起源于具有相反自旋态的入射圆偏振光诱导的不同等离子体共振。此外，通过将超颖表面与液晶相结合，可以通过施加偏置电压来动态地重新配置自旋选择性吸收和手性。多频带吸收，无背板和可重构的有利特征使得我们提出的液晶加载的手性超颖表面潜在地用于各种光子应用。
Light absorption plays a key role in numerous photonic devices. In this work, we theoretically demonstrate that multiband circularly polarized light can be spin-selectively absorbed with a single-layered metasurface. The difference of absorption efficiency between left- and right-handed circularly polarized light can reach 40%. This giant chiroptical effect originates from different plasmonic resonances induced by the incident circularly polarized light with opposite spin states. Furthermore, by integrating the metasurface with nematic liquid crystals, the spin-selective absorption and the chirality can be dynamically reconfigured via applying a bias voltage. The advantageous features of being multiband-absorptive, backplane-free and reconfigurable make our proposed liquid-crystal-loaded chiral metasurfaces potentially useful for various photonic applications.