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The uniaxial strain dependence of refractive index anisotropy has been measured for a series of high-porosity aerogel samples. Uniaxial compression of compliant aerogels introduces an optical activity into the material. We report on the compression-dependent optical birefringence of samples with porosities from 95 to 99% under a uniaxial compression of up to 15% in the spectral range 320–800 nm.
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Bhupathi et al. (2010) studied this question.
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