We report the design, fabrication, and characterization of a porous silicon-based omnidirectional mirror for the near infrared range. The structure consists of 300 porous silicon chirped dielectric layers, optimized to have omnidirectional reflectivity response from 1000 to 2000 nm wavelength range. Measurements of reflectivity spectra are presented for non-polarized light at several incident angles (range 8 °– 65 °) with a reflectivity >95% covering a 1 μ m band-width. Transfer matrix method calculations were carried out to show the complete angular range for both TM and TE polarizations including a simple model to illustrate the interface scattering effects.

中文翻译：

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一种用于近红外范围的宽带多孔硅全向反射镜

我们报告了近红外范围内多孔硅基全向镜的设计、制造和表征。该结构由 300 个多孔硅啁啾介电层组成，经过优化以在 1000 至 2000 nm 波长范围内具有全向反射率响应。以几个入射角（范围 8°– 65°）的非偏振光测量反射率光谱，反射率 >95%，覆盖 1 μm 带宽。执行传递矩阵方法计算以显示 TM 和 TE 极化的完整角度范围，包括一个简单的模型来说明界面散射效应。