基于光子晶体的一维位置敏感探测器
One-dimensional position sensitive detector based on photonic crystals
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摘要: 位置敏感探测器（PSD）是基于半导体的横向光电效应的光电转换器件。根据横向光电效应的原理，增强光生载流子的寿命可提高光生载流子的扩散长度，从而实现横向光电效应的增强。利用缺陷和完整光子晶体设计了一维位置敏感探测器，并用传输矩阵法计算了缺陷光子晶体的透射率和完整光子晶体的反射率。从所设计的位置敏感探测器对入射光的响应理论研究表明，提高缺陷光子晶体的透射率和完整光子晶体的反射率可提高光生载流子的寿命，从而实现增强位置敏感探测器的横向光电效应。Abstract: Position sensitive detectors (PSDs) are an important class of optical sensors which utilizes the lateral photovoltaic effect (LPVE). According to the operation principle of PSD, we demonstrate that LPVE can be enhanced by lengthening the lifetime of photo-generated carriers. A PSD based on photonic crystals (PCs) composed of MgF2 and InP is proposed and designed. The transmittances of the defect PC and the reflectance of the perfect PC in the PSD are obtained with transfer matrix method. The theoretical research on the designed device shows that LPVE is enhanced by improving the transmittance of the defect PC and the reflectance of the perfect PC to lengthen the lifetime of photo-generated carriers.
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