Institut für Angewandte Physik, Universität Bonn, 53115 Bonn, Germany.
Opt Lett. 2010 Sep 15;35(18):3150-2. doi: 10.1364/OL.35.003150.
We present a hydrogen sensor based on metallic photonic crystal slabs. Tungsten trioxide (WO(3)) is used as a waveguide layer below an array of gold nanowires. Hydrogen exposure influences the optical properties of this photonic crystal arrangement by gasochromic mechanisms, where the photonic crystal geometry leads to sharp spectral resonances. Measurements reveal a change of the transmission depending on the hydrogen concentration. Theoretical limits for the detection range and sensitivity of this approach are discussed.
我们提出了一种基于金属光子晶体平板的氢气传感器。氧化钨（WO(3)）用作金纳米线阵列下方的波导层。氢气暴露通过气致变色机制影响这种光子晶体结构的光学性质，其中光子晶体几何形状导致了尖锐的光谱共振。测量结果表明，传输取决于氢气浓度而变化。讨论了这种方法的检测范围和灵敏度的理论限制。
