Optical humidity-sensitive mechanism based on refractive index variation |
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| Authors: | Zhenyuan Wang Zhengtian Gu |
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| Institution: | 1. College of Optoelectric and Electric Information Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
2. Laboratory of Photo-Electric Functional Films,College of Science,University of Shanghai for Science and Technology,Shanghai 200093,China |
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| Abstract: | A novel composite model is put forward for humidity-sensitive material based on Maxwell-Garnett and effective medium theory. The analytical expression of the relation between effective refractive index and relative humidity is shown with different absorption factors and porosities. The larger the absorption factor is, the higher the refractive index is. The refractive index of humidity-sensitive SiO_2 film decreases with the increase of ceramic material porosity. The sensitivity of optical humidity sensor c... |
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