Avila L F, Freschi A A, Cescato Lucila
Optics Laboratory, Gleb Wataghin Institute of Physics, CxP 6165, University of Campinas (UNICAMP),13083-970 Campinas, São Paulo, Brazil.
Appl Opt. 2010 Jun 20;49(18):3499-505. doi: 10.1364/AO.49.003499.
We use a holographic technique to measure simultaneously and separately the temporal evolution of the refractive-index and the absorption coefficient modulations induced by light in a photosensitive material. The technique is phase sensitive, allowing separation of the signals from the phase and from the amplitude grating. The refractive-index and the absorption coefficient modulations as well as the kinetic constant of the photoreaction in the positive photoresist SC 1827 were measured at three different wavelengths. The results were compared with independent measurements, performed under homogeneous exposition. The good accord demonstrates the applicability of the technique to study photosensitive materials.
我们使用一种全息技术来同时且分别测量光在光敏材料中引起的折射率调制和吸收系数调制的时间演化。该技术是相位敏感的，能够将来自相位光栅和振幅光栅的信号分离。在三种不同波长下测量了正性光刻胶SC 1827中的折射率调制、吸收系数调制以及光化学反应的动力学常数。将结果与在均匀曝光条件下进行的独立测量进行了比较。良好的一致性证明了该技术在研究光敏材料方面的适用性。
