气凝胶波板
Aerogel Waveplates
摘要：
在不同程度的单轴应变下对98%孔隙率的二氧化硅气凝胶样品进行光学透射测量。单轴压缩气凝胶表现出大的双折射，成比例的压缩量，高达15%的应变研究。通过多次压缩-减压循环，双折射大多是可逆的和可再现的。我们的研究表明，单轴应变的高孔隙率气凝胶可以用作可调谐波片在一个广泛的光谱范围。
英文摘要：
Optical transmission measurements were made on 98% porosity silica aerogel samples under various degrees of uniaxial strain. Uniaxially compressed aerogels exhibit large birefringence, proportional to the amount of compression, up to the 15% strain studied. The birefringence is mostly reversible and reproducible through multiple compression-decompression cycles. Our study demonstrates that uniaxially strained high porosity aerogels can be used as tunable waveplates in a broad spectral range.
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