Surface plasmon resonance excitation with optical fiber gratings has been typically studied in aqueous solutions. This work describes the procedure to excite a plasmon wave in gaseous media and perform refractive index measurements in these environments. Grating photo-inscription with 193 nm excimer laser radiation allows us to obtain slightly tilted fiber Bragg gratings exhibiting a cladding mode resonance comb along several hundreds of nanometers. Their refractive index sensitive range extends from gases to liquids, so operation in both media is compared. We demonstrate that the thickness of the metal coating required for surface plasmon excitation in gases is roughly one third of the one usually used for liquids. The developed platforms exhibit a temperature insensitive response of 78 nm/RIU when tested with different gases.

中文翻译：

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光纤光栅在气态介质中的表面等离振子共振传感

通常已经在水溶液中研究了用光纤光栅进行的表面等离子体激元共振激发。这项工作描述了在气体环境中激发等离子体波并在这些环境中执行折射率测量的过程。用193 nm受激准分子激光辐射对光栅进行光刻记，可以使我们获得略微倾斜的光纤布拉格光栅，该光栅在几百纳米的范围内呈现出包层模式共振梳。它们的折射率敏感范围从气体扩展到液体，因此比较了两种介质的操作。我们证明，气体中的表面等离激元激发所需的金属涂层的厚度约为通常用于液体的金属涂层的三分之一。当使用不同的气体进行测试时，开发的平台对温度的敏感度为78 nm / RIU。