In this paper, a novel method is proposed, and employed to design a single diffractive optical element (DOE) for implementing spectrum-splitting and beam-concentration (SSBC) functions simultaneously. We develop an optimization algorithm, through which the SSBC DOE can be optimized within an arbitrary thickness range, according to the limitations of modern photolithography technology. Theoretical simulation results reveal that the designed SSBC DOE has a high optical focusing efficiency. It is expected that the designed SSBC DOE should have practical applications in high-efficiency solar cell systems.
Design optimization of highly efficient spectrum-splitting and beam-concentrating diffractive optical element for lateral multijunction solar cells * Wang Jin-Ze(王进泽) a)b) , Ye Jia-Sheng(叶佳声) c) , Huang Qing-Li(黄庆礼) a)b) , Xu Xin(许 信) a)b) , Li Dong-Mei(李 冬梅) a)b) , Meng Qing-Bo(孟庆波) a)b) † , and Yang Guo-Zhen (杨国桢) d) ‡
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