We analyze the real and imaginary parts of cBN in a broad wavelength range both 0.5-1.0 µm and 1.36-10 µm respectively, and use both Fresnel theory and Meep software package to calculate the transmittance and reflectance. The theoretical and numerical results show that the transmision and reflection on the interfaces mentioned above have an abnormal phenomenon, and the physical mechanism is analyzed. Between 0.5 μm and 1 μm, the cBN film is transparent with the transmissivity equal to the order of 1.0. When the light wavelength is in the range of 4-9 μm, the structures made of cBN and Si, such as cBN film, cBN-Si double layer film and multiple layer film, have the same optical characteristic with the highest reflectivity and lower absorptivity and zero transmissivity. These findings can be used in the structure design of the optoelectronic devices, such as the optical bandpass filter, the optical bandstop filter, the optical attenuator, the photodetector, and the solar cell.

中文翻译：

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cBN-Si 接口的宽带传输特性


我们分别在0.5-1.0 µm和1.36-10 µm的宽波长范围内分析cBN的实部和虚部，并使用菲涅尔理论和Meep软件包计算透射率和反射率。理论和数值结果表明上述界面上的透射和反射存在异常现象，并分析了其物理机制。在0.5μm到1μm之间，cBN薄膜是透明的，透射率等于1.0量级。当光波长在4-9μm范围内时，cBN和Si制成的结构，如cBN薄膜、cBN-Si双层薄膜和多层薄膜，具有相同的光学特性，具有最高的反射率和较低的吸收率和零透射率。这些发现可用于光电器件的结构设计，例如光学带通滤波器、光学带阻滤波器、光学衰减器、光电探测器和太阳能电池。