论文部分内容阅读
本文利用势透射率概念设计诱透射滤光片(以下简称IT滤光片)。分析了这种滤光片的通带形状,通带半宽度,峰值透射率,截止深度等与吸收层的几何厚度d,介质膜系折射率之差值n_h—n_L,以及组成λ/4堆的周期数P之间的关系。设计结果表明,对于任意厚度的吸收层,只要合理设计匹配层与λ/4堆,便可以得到通带形状良好,峰值透射率接近最大势透射率,长波无旁通带并且截止很深的IT滤光片。本文还给出了包含吸收膜堆的IT滤光片设计,以及得到高峰值透射率和窄通带半宽度的方法。
In this paper, the concept of potential transmissivity transmission filter design (hereinafter referred to as IT filter). The passband shape, passband half-width, peak transmissivity, cut-off depth and the like of the filter are analyzed. The difference between the geometrical thickness d of the absorption layer, the refractive index n_h-n_L of the dielectric film and the refractive index of the λ / 4 stack The number of cycles P between the relationship. The design results show that for any thickness of absorption layer, as long as the matching layer and λ / 4 stack are designed reasonably, the IT with good passband shape, peak transmittance close to maximum potential transmissivity, long wave unobstructed band and deep cutoff IT Filter. This article also presents an IT filter design that includes an absorber stack, as well as a method to achieve high peak transmittance and narrow half-width of the passband.