论文标题
红外偏振器基于直接耦合到表面播种
Infrared polarizer based on direct coupling to surface-plasmon polaritons
论文作者
论文摘要
我们提出了一种基于偏振依赖性耦合到自由空间与表面偏振子（SPP）的新型反射偏振器。这个廉价的偏振器相对较窄，但具有高达1000的灭绝比，对于所需的极化（来自计算的数字），效率高达95％，因此可以堆叠以达到106或更高的灭绝率。作为概念的证明，我们通过使用铝阳极氧化（一种低成本的电化学过程），实验实验实现了基于纳米多孔氧化偏振层的偏光层，该偏振剂的作用约为10.6 um，与二氧化碳激光器的输出相对应。
We propose a new type of reflective polarizer based on polarization-dependent coupling to surface-plasmon polaritons (SPPs) from free space. This inexpensive polarizer is relatively narrowband but features an extinction ratio of up to 1000 with efficiency of up to 95% for the desired polarization (numbers from a calculation), and thus can be stacked to achieve extinction ratios of 106 or more. As a proof of concept, we experimentally realized a polarizer based on nanoporous aluminum oxide that operates around a wavelength of 10.6 um, corresponding to the output of a CO2 laser, using aluminum anodization, a low-cost electrochemical process.
