可见光在介电聚合物中的纳米结构铌带中的传播
Propagation of Visible Light in Nanostructured Niobium Stripes Embedded in a Dielectric Polymer
摘要：
纳米金属条通过激发和传播表面局域的倏逝电磁波来传输光信号，在纳米光子学领域具有重要的应用。虽然这种等离子体现象通常利用贵金属，如Ag或Au，但其他材料可以表现出可行的光传输效率。在这项工作中，我们证明了可见光的传输纳米铌条纹耦合的介电聚合物层，利用远程激发/检测的拉曼信号的黑磷（bP）作为探针。光传输机制归因于在Nb/聚合物界面处的表面等离子体激元的产生。由于铌在光学范围内的损耗性质，传播长度受到限制，但这种材料可以允许利用贵金属对应物中不存在的特定功能。
英文摘要：
Nanometric metallic stripes allow the transmission of optical signals via the excitation and propagation of surface-localized evanescent electromagnetic waves, with important applications in the field of nano-photonics. Whereas this kind of plasmonic phenomena typically exploits noble metals, like Ag or Au, other materials can exhibit viable light-transport efficiency. In this work, we demonstrate the transport of visible light in nanometric niobium stripes coupled with a dielectric polymeric layer, exploiting the remotely-excited/detected Raman signal of black phosphorus (bP) as the probe. The light-transport mechanism is ascribed to the generation of surface plasmon polaritons at the Nb/polymer interface. The propagation length is limited due to the lossy nature of niobium in the optical range, but this material may allow the exploitation of specific functionalities that are absent in noble-metal counterparts.
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