Remote Non-Invasive Fabry-Pérot Cavity Spectroscopy for Label-Free Sensing.

Remote Non-Invasive Fabry-Pérot Cavity Spectroscopy for Label-Free Sensing.
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DOI:
10.3390/s23010385
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发表时间:
2022-12-29
期刊:
Sensors (Basel, Switzerland)
影响因子:
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通讯作者:
Beige A
Beige A
中科院分区:
其他
文献类型:
--
作者:
Al Ghamdi A;Dawson B;Jose G;Beige A

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光学监测分子浓度的一种方法是利用法布里-珀罗腔的透射率和反射率对其光学性质变化的高度敏感性。到目前为止,本征和非本征法布里-珀罗腔传感器已经被考虑,被分析物要么被放置在谐振器内,要么被耦合到外部的逝去的场。在这里,我们展示了法布里-佩罗腔也可以用于非侵入性和远程监测分子浓度,因为从目标分子返回到法布里-佩罗腔的光的反射将向上的峰值添加到其总反射率的最小值。检测这些峰的幅度可以揭示有关分子浓度的信息。通过使用光学腔阵列,可以一次探测到很大范围的频率,并可以获得独特的光学指纹。
One way of optically monitoring molecule concentrations is to utilise the high sensitivity of the transmission and reflection rates of Fabry-Pérot cavities to changes of their optical properties. Up to now, intrinsic and extrinsic Fabry-Pérot cavity sensors have been considered with analytes either being placed inside the resonator or coupled to evanescent fields on the outside. Here we demonstrate that Fabry-Pérot cavities can also be used to monitor molecule concentrations non-invasively and remotely, since the reflection of light from the target molecules back into the Fabry-Pérot cavity adds upwards peaks to the minima of its overall reflection rate. Detecting the amplitude of these peaks reveals information about molecule concentrations. By using an array of optical cavities, a wide range of frequencies can be probed at once and a unique optical fingerprint can be obtained.
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