Inspired by the near-perfect light-harvesting mechanism in the phycobilisome complex of cyanobacterial cells, a hemicylindrical antenna-shaped photonic structure is proposed and analyzed in the present work for photovoltaic, photonic, and photochemistry applications. Results from finite difference time domain method-based analysis reveal that a cSi-based photonic structure with identical dimensions of the phycobilisome has a very low absorption efficiency in the peak solar wavelength regime. However, by scaling up and optimizing the geometric parameters of the antenna-like photonic structure, a light absorption efficiency of 90.5% can be achieved within a broad wavelength range of 400 to 900 nm. Besides being polarization-insensitive in terms of absorption, the optimized structure exhibits extraordinary dichroism property at a 45° angle of incidence. In addition, calculated electrical performance of the optimized structure is highly promising with a 21.05% photoconversion efficiency as a single-junction solar cell. Such encouraging polarization-insensitive broadband absorption properties and photoconversion efficiency on the silicon platform make the proposed bioinspired photonic structure an excellent candidate for a plethora of applications in photochemistry, optical detection, photovoltaics, and other photonic applications.

中文翻译：

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仿生硅光子结构中的高效宽带光吸收


受蓝藻细胞藻胆体复合体中近乎完美的光捕获机制的启发，在目前的光伏、光子和光化学应用工作中，提出并分析了半圆柱形天线形光子结构。基于有限差分时域方法的分析结果表明，与藻胆体尺寸相同的基于晶硅的光子结构在峰值太阳波长范围内具有非常低的吸收效率。然而，通过放大和优化类天线光子结构的几何参数，可以在400至900 nm的宽波长范围内实现90.5%的光吸收效率。除了在吸收方面对偏振不敏感之外，优化的结构在 45° 入射角下表现出非凡的二色性。此外，经计算，优化结构的电性能非常有前景，作为单结太阳能电池，其光电转换效率为 21.05%。硅平台上这种令人鼓舞的偏振不敏感宽带吸收特性和光转换效率使得所提出的仿生光子结构成为光化学、光学检测、光伏和其他光子应用领域众多应用的绝佳候选者。