A thin absorbing layer at the center of a Fabry-Pérot interferometer
A thin absorbing layer at the center of a Fabry-Pérot interferometer
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法布里-珀罗干涉仪中心的薄吸收层
DOI：
10.1051/jp2:1994139
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
C. Helm
中科院分区：
文献类型：
--
作者：
P. Mächtle;C. Müller;C. Helm
通过实验和理论研究了溶解在溶液中或吸附在法布里-珀罗干涉仪中心界面上的染料（罗丹明 B）对传输的影响。我们表明，（i）极薄膜的光谱可以在亚单层浓度下测量（一个单层使透射率降低≃50％），（ii）透射率对纳米范围内极薄膜的位置敏感，（iii）通过理论和实验之间的比较定量确定吸收系数，从而允许人们估计局部浓度。结果与使用染料探针监测表面力装置中有机界面的变化以及通常检测相邻表面之间界面的变化相关
The influence of a dye (Rhodamin B) dissolved in solution or adsorbed at an interface at the center of a Fabry-Perot interferometer on the transmission was investigated both experimentally and theoretically. We show that (i) spectra of extremely thin films are measurable at sub-monolayer concentration (one monolayer reduces the transmission by ≃50%), (ii) the transmission is sensitive to the location of an extremely thin film within nm range and (iii) the absorption coefficient is determined quantitatively by comparison between theory and experiment thus permitting one to estimate the local concentration. The results are relevant for the use of dye probes to monitor changes of organic interfaces in the Surface Forces Apparatus as well as generally to detect changes of interfaces between adjacent surfaces