Third-order nonlinear susceptibilities (χ(3)) for thin films of oligo- and polygermanes were measured in the range of 0.6—86 × 10−12 esu. A measured χ(3)of 86 × 10−12 esu for a polygermane–polysilane random copolymer, coploy(methylphenylsilylene/methylphenylgermylene), was the largest ever reported for transparent polymers in the visible spectral region.
对寡聚物和聚德国烷薄膜的三阶非线性电磁响应(χ(3))在0.6—86 × 10−12 esu范围内进行了测量。对于随机共聚物聚德国烷-聚
硅烷(coploy(methylphenylsilylene/methylphenylgermylene),测得的χ(3)为86 × 10−12 esu,这是迄今为止在可见光谱区域内报道的透明聚合物中最大的值。