All-dielectric nanoarrays have strong electromagnetic resonances with various interesting applications and are tuned by adjusting their geometrical parameters. However, their optical properties are permanently encoded during fabrication. This study presents robust dynamically tunable all-dielectric nanoresonators for controllable, reversible, and reproducible color filtering. Our design uses an array of TiO2 nanodiscs embedded in a transparent, stretchable polydimethylsiloxane (PDMS) membrane and exhibits a narrow spectral response due to Mie magnetic and electric dipole resonances hybridized with the TiO2 nanodiscs lattice modes. By mechanically stretching the PDMS membrane, the pitch of the TiO2 nanodiscs was increased and the spectral location of the resonances was altered. Additionally, an optically asymmetric structure was fabricated by partially embedding TiO2 nanodiscs in PDMS. Thus, the magnitude of the Rayleigh anomaly diffraction, which could interrupt the dipole resonances, was reduced. Our design has sharp, frequency-tunable resonances in the visible spectrum, and we demonstrated dynamic tunability by stretching the metasurfaces.

中文翻译：

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使用共振 TiO2 纳米结构动态选择可见波长

全电介质纳米阵列具有强烈的电磁共振，具有各种有趣的应用，可通过调整其几何参数进行调谐。然而，它们的光学特性在制造过程中被永久编码。本研究提出了稳健的动态可调谐全电介质纳米谐振器，用于可控、可逆和可重现的滤色。我们的设计使用了一系列 TiO2个嵌入透明、可拉伸聚二甲基硅氧烷 (PDMS) 膜中的纳米圆盘，由于与 TiO2 杂化的 Mie 磁偶极子共振和电偶极子共振表现出窄光谱响应2个纳米圆盘晶格模式。通过机械拉伸 PDMS 膜，TiO2 的间距2个纳米圆盘增加，共振的光谱位置发生改变。此外，通过部分嵌入 TiO2 制造了光学不对称结构2个PDMS 中的纳米圆盘。因此，降低了可能中断偶极共振的瑞利异常衍射的幅度。我们的设计在可见光谱中具有尖锐的频率可调共振，并且我们通过拉伸超表面展示了动态可调性。