Diffraction from tunable periodic structures: application for the determination of electro-optic coefficients.
Diffraction from tunable periodic structures: application for the determination of electro-optic coefficients.
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DOI：
10.1364/ao.40.005583
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发表时间：
2001-11
期刊：
影响因子：
1.9
通讯作者：
X. Yang;L. T. Wood;J. H. Miller
中科院分区：
文献类型：
--
作者：
X. Yang;L. T. Wood;J. H. Miller
讨论了一种利用可调谐光栅衍射测量电光系数的方法。该方法涉及测量反射光栅的衍射图案的变化，其中交替方向的施加电场通过电光效应引起折射率的变化。对于某些几何形状，这些施加的场引起倍周期效应，在衍射图案中产生新的峰。数值计算的衍射图案的均匀和非均匀的领域的假设。峰分裂，作为一个函数的狭缝照明的数目和诱导的折射率的变化，观察和讨论。最后讨论了该方法在电光系数测量中的应用。
We discuss a method for measuring electro-optic coefficients by measuring diffraction from a tunable grating. The method involves measuring the changes in the diffraction pattern of a reflection grating, where applied electric fields of alternating direction induce changes in the index of refraction through the electro-optic effect. For certain geometries, these applied fields cause period-doubling effects that produce new peaks in the diffraction pattern. Numerically calculated diffraction patterns are presented for the assumptions of both homogeneous and inhomogeneous fields. Peak splitting, as a function of both the number of slits illuminated and the induced change in the index of refraction, is observed and discussed. Finally, the usefulness of our method for the measurement of electro-optic coefficients is discussed.