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Large-modulation-depth polarization-controlled multiple switching based on magnetic responses in all-dielectric metasurface
Journal of Nanophotonics ( IF 1.5 ) Pub Date : 2021-08-01 , DOI: 10.1117/1.jnp.15.036004
Wudeng Wang 1 , Li Xiong 1 , Huizhen Yan 1
Affiliation  

We propose an all-dielectric metasurface with strong polarization sensitivity and large-modulation-depth for potential multiple switching applications. We show that the proposed metasurface can be efficiently tailored through symmetry breaking to support strong toroidal and trapped dipole responses across the near infrared spectrum with high Q-factors. Such two responses can be dynamically switched on and off simultaneously only through changing polarization of incident light, and the direction of toroidal dipole can be rotated 90 deg in two separate frequency regimes. The maximum values of the amplitude modulation depth around responses can almost reach 100% simultaneously, respectively, providing the potential applications in sensing, lasing, switching, and spectral filtering.

中文翻译:

基于全介电超表面磁响应的大调制深度极化控制多重切换

我们为潜在的多开关应用提出了一种具有强极化敏感性和大调制深度的全介电超表面。我们表明,可以通过对称破坏有效地定制所提出的超表面,以支持具有高 Q 因子的近红外光谱的强环形和俘获偶极子响应。只有通过改变入射光的偏振,才能同时动态打开和关闭这两种响应,并且环形偶极子的方向可以在两个单独的频率范围内旋转 90 度。响应周围的调幅深度最大值几乎可以同时达到100%,在传感、激光、开关和光谱滤波等方面具有潜在的应用前景。
更新日期:2021-08-20
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