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首页> 外文期刊>Applied optics >New miniaturized exhaled nitric oxide sensor based on a high Q/V mid-infrared 1D photonic crystal cavity
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New miniaturized exhaled nitric oxide sensor based on a high Q/V mid-infrared 1D photonic crystal cavity

机译：基于高Q / V中红外一维光子晶体腔的新型小型呼出气一氧化氮传感器

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A high Q/V mid-infrared 1D photonic crystal cavity in chalcogenide glass AMTIR-1 (Ge33As12Se55) resonating at lambda(R) = 5.26 mu m has been proposed as a key element of a sensor able to evaluate the nitric oxide (NO) concentration in the exhaled breath, namely fraction exhaled NO. The cavity design has been carried out through 3D finite-element method simulations. A Q-factor of 1.1 x 10(4) and a mode volume V = 0.8 (lambda)(3), corresponding to a Q/V ratio of 1.4 x 10(4) (lambda)(-3), have been obtained with a resonance transmission coefficient T = 15%. A sensitivity of 10 ppb has been calculated with reference to the photothermal physical property of the material. Such a result is lower than the state-of-the-art of NO sensors proposed in literature, where hundreds of parts per trillion-level detection seem to have been achieved, but comparable with the performance obtained by commercial devices. The main advantages of the new device are in terms of footprint (=150 mu m(2)), smaller at least 1 order of magnitude than those in literature, fast response time (only few seconds), and potential low cost. Such properties make possible in a hand-held device the sensor integration in a multi-analysis system for detecting the presence of several trace gases, improving prevention, and reducing the duration of drug treatment for asthma and viral infections. (C) 2015 Optical Society of America
机译：硫属元素化物玻璃AMTIR-1（Ge33As12Se55）在lambda（R）= 5.26μm处共振的高Q / V中红外一维光子晶体腔已被提议作为能够评估一氧化氮（NO）的传感器的关键元件。呼气中的浓度，即呼出NO的分数。腔体设计已通过3D有限元方法仿真进行。 Q因子为1.1 x 10（4），模式体积V = 0.8（λ/ n）（3），对应于Q / V比为1.4 x 10（4）（lambda / n）（-3）已经获得了具有共振透射系数T ＝ 15％的R 1。参考该材料的光热物理性能，已计算出10 ppb的灵敏度。这样的结果比文献中提出的最新的NO传感器要低，在文献中，似乎已经实现了每万亿分之几百个级别的检测，但可与商用设备获得的性能相媲美。新设备的主要优势在于占位面积（= 150μm（2）），比文献记载的尺寸小至少1个数量级，快速的响应时间（仅几秒钟）和潜在的低成本。这样的特性使得在手持式设备中将传感器集成到多重分析系统中，可以检测多种痕量气体的存在，提高预防效果，并减少哮喘和病毒感染的药物治疗时间。 （C）2015年美国眼镜学会

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