Bialiayeu A, Caucheteur C, Ahamad N, Ianoul A, Albert J
Department of Electronics, Carleton University, 1125 Colonel By Drive, K1S 5B6 Ottawa, Canada.
Opt Express. 2011 Sep 26;19(20):18742-53. doi: 10.1364/OE.19.018742.
We present a novel method to prepare optimized metal coatings for infrared Surface Plasmon Resonance (SPR) sensors by electroless plating. We show that Tilted Fiber Bragg grating sensors can be used to monitor in real-time the growth of gold nano-films up to 70 nm in thickness and to stop the deposition of the gold at a thickness that maximizes the SPR (near 55 nm for sensors operating in the near infrared at wavelengths around 1550 nm). The deposited films are highly uniform around the fiber circumference and in spite of some nanoscale roughness (RMS surface roughness of 5.17 nm) the underlying gratings show high quality SPR responses in water.
我们提出了一种通过化学镀制备用于红外表面等离子体共振（SPR）传感器的优化金属涂层的新方法。我们表明，倾斜光纤布拉格光栅传感器可用于实时监测厚度达70 nm的金纳米膜的生长，并在使SPR最大化的厚度（对于在1550 nm左右波长的近红外波段工作的传感器，接近55 nm）时停止金的沉积。沉积的薄膜在光纤圆周周围高度均匀，尽管存在一些纳米级粗糙度（表面均方根粗糙度为5.17 nm），但底层光栅在水中仍显示出高质量的SPR响应。
