摘要
斜入射滤光片的S偏振和P偏振的中心波长会发生分离,而通过调整间隔层的有效折射率,可使有角度入射滤光片两个偏振分量的中心波长相重合。由相位关系分析着手,利用多层膜的特征矩阵关系式,推导出间隔层中间折射率和P偏振及S偏振的中心波长的两个隐函数表达式,由此可快速解出所寻找的中间折射率及对应的中心波长数值。单腔和三腔的两个具体实例的模拟计算表明:采用此算法,对于调谐到一特定角度入射的滤光片能很快地求出准确的中间折射率数值,应用此中间折射率即可使P偏振和S偏振的中心波长很好地重合。入射角从0°到30°的实例偏差分析表明此算法的精确度高,这对于减少偏振分量特性之间的分离以及滤光片的宽角度调谐有着良好的意义。
Central wavelength of S-polarization and P-polarization will separate when the filter is tilted. But the central wavelength of two polarization components in angle-tuned filter can be coincided by adjusting effective refractive index of spacer. Beginning with the analysis of phase relationship and by use of the characteristic matrix expression of multilayer films, two implicit function expressions of middle layer's refractive index of spacer and central wavelength of P-polarization and S-polarization are deduced. Therefore the value of middle layer's refractive index and corresponding central wavelength can be quickly and accurately obtained. Simulation calculations of two concrete filter designs for single cavity and three cavities prove that the method is feasible. Based on the samples data analysis of difference curves with incidence angle from 0° to 30°, it is proven that the algorithm is highly accurate.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2005年第5期707-711,共5页
Acta Optica Sinica
基金
国家自然科学基金(10174057)
高等学校博士学科点专项科研基金(20030613007)资助课题。
