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首页> 外文会议>Sensors, 2011 IEEE >Tunable and reconfigurable plasmonic-photonic resonances in hybrid metallo-dielectric quasicrystals for biosensing
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Tunable and reconfigurable plasmonic-photonic resonances in hybrid metallo-dielectric quasicrystals for biosensing

机译：杂化金属介电准晶体中可调谐和可重构的等离子-光子共振，用于生物传感

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摘要

We report the first evidence of out-of-plane resonances in hybrid metallo-dielectric quasi-crystal nanostructures composed of metal-backed aperiodically-patterned low-contrast dielectric layers. We numerically and experimentally characterize these resonant phenomena and investigate the underlying physics. We show that, by comparison with standard periodic structures, a richer spectrum of resonant modes may be excited. Such modes are characterized by a distinctive plasmonic or photonic behavior, discriminated by their field distribution and dependence on the metal thickness. The response is accurately predicted via computationally-affordable periodic-approximant-based numerical modeling. Finally, we explore the structure functionalization via nanosized high refractive index overlays, for resonance tuning and quality-factor (Q) enhancement, as well as its surface sensitivity to deposition of nanolayers of materials mimicking bio-molecular binding. Overall, we excite resonant modes, with state-of-the-art quality factors and sensing/tuning efficiencies, of interest for developing novel optical devices for communications and sensing applications.
机译：我们报告的混合金属金属介电准晶体纳米结构中的金属背衬非周期性图案的低对比度介电层组成的平面外共振的第一个证据。我们在数值上和实验上表征了这些共振现象，并研究了潜在的物理学。我们显示，通过与标准周期性结构比较，可以激发更丰富的共振模式频谱。这种模式的特征在于独特的等离子或光子行为，通过其场分布和对金属厚度的依赖性来区分。该响应是通过可计算得起的基于周期近似的数值模型准确预测的。最后，我们通过纳米尺寸的高折射率覆盖层探索结构功能化，以进行共振调谐和质量因子（Q）增强，以及其对模拟生物分子结合的纳米层材料沉积的表面敏感性。总体而言，我们将激发共振模式，并结合最新的品质因数和传感/调谐效率，以开发用于通信和传感应用的新型光学器件。

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