Tunable Chiral Optics in All-Solid-Phase Reconfigurable Dielectric Nanostructures.
Tunable Chiral Optics in All-Solid-Phase Reconfigurable Dielectric Nanostructures.
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可调的手性光学元件中的全相可重构介电纳米结构。
DOI:
10.1021/acs.nanolett.0c03957
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发表时间:
2021-01-27
期刊:
影响因子:
10.8
通讯作者:
Zheng Y
中科院分区:
文献类型:
--
作者:
Li J;Wang M;Wu Z;Li H;Hu G;Jiang T;Guo J;Liu Y;Yao K;Chen Z;Fang J;Fan D;Korgel BA;Alù A;Zheng Y
Subwavelength nanostructures with tunable compositions and geometries show favorable optical functionalities for the implementation of nanophotonic systems. Precise and versatile control of structural configurations on solid substrates is essential for their applications in on-chip devices. Here, we report all-solid-phase reconfigurable chiral nanostructures with silicon nanoparticles and nanowires as the building blocks in which the configuration and chiroptical response can be tailored on-demand by dynamic manipulation of the silicon nanoparticle. We reveal that the optical chirality originates from the handedness-dependent coupling between optical resonances of the silicon nanoparticle and the silicon nanowire via numerical simulations and coupled-mode theory analysis. Furthermore, the coexisting electric and magnetic resonances support strong enhancement of optical near-field chirality, which enables label-free enantiodiscrimination of biomolecules in single nanostructures. Our results not only provide insight into the design of functional high-index materials but also bring new strategies to develop adaptive devices for photonic and electronic applications.
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