Guided Bloch Surface Waves on Ultrathin Polymeric Ridges
Guided Bloch Surface Waves on Ultrathin Polymeric Ridges
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DOI：
10.1021/nl100481q
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发表时间：
2010-06-01
期刊：
影响因子：
10.8
通讯作者：
Giorgis, Fabrizio
中科院分区：
文献类型：
--
作者：
Descrovi, Emiliano;Sfez, Tristan;Giorgis, Fabrizio
我们提出了一个直接的证据布洛赫表面波（BSWs）波导的聚合物脊，近场测量的支持。研究表明，由硅基多层膜维持的近红外背散射波可以局部耦合并引导通过纳米厚度的电介质脊，且传播损耗低。使用传统的棱镜为基础的配置，我们展示了一个波长选择BSW耦合的内部和外部的脊。这样的结果可以在表面波介导的传感应用中打开有趣的机会，其中光可以选择性地耦合在由纳米浮雕限定的特定区域中。
We present a direct evidence of Bloch surface waves (BSWs) waveguiding on ultrathin polymeric ridges, supported by near-field measurements. It is demonstrated that near-infrared BSWs sustained by a silicon-based multilayer can be locally coupled and guided through dielectric ridges of nanometric thickness with low propagation losses. Using a conventional prism-based configuration, we demonstrate a wavelength-selective BSW coupling inside and outside the ridge. Such a result can open interesting opportunities in surface wave-mediated sensing applications, where light could be selectively coupled in specific regions defined by nanometric reliefs.