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Design of symmetric planar fishnet metamaterials for optical wavelength range

机译:光学波长范围内对称平面鱼网超材料的设计

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In this work we analyze fishnet-type optical metamaterials with full electromagnetic symmetry, fabricated in an ultrathin, freestanding film (self-supported nanomembrane). We utilized the finite element method to simulate the response of various laminar fishnet geometries, including metal-dielectric-metal and dielectric-metal-dielectric-metal-dielectric multilayers. We varied metal and dielectric thickness, nanoaperture radius, metal and dielectric materials. We considered the tunability of the spectral characteristics of the fishnet by bringing a dielectric analyte in contact with its exposed surfaces. Such tunability is of importance for all-optical sensors of chemical or biological analytes, but also for the performance of general fishnet nanoaperture arrays in real operating conditions, where the introduction of the ambient gases and fluids will modify their plasmonic properties.
机译:在这项工作中,我们分析了完全电磁对称的鱼网型光学超材料,该材料由超薄的独立膜(自支撑纳米膜)制成。我们利用有限元方法来模拟各种层状渔网几何形状的响应,包括金属-电介质-金属和电介质-金属-电介质-金属-电介质多层。我们改变了金属和电介质的厚度,纳米孔径半径,金属和电介质材料。我们通过使介电分析物与其裸露的表面接触来考虑鱼网光谱特征的可调性。这种可调谐性对于化学或生物分析物的全光学传感器非常重要,但对于在实际操作条件下一般鱼网纳米孔径阵列的性能也很重要,在这种条件下,环境气体和流体的引入会改变其等离子体性能。

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