| Absorptive Fabry–Pérot Interference in a Metallic Nanostructure |
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| 引用本文： | 王瑞,吴艳玲,余博晗,胡立立,顾长志,李俊杰,赵继民.Absorptive Fabry–Pérot Interference in a Metallic Nanostructure[J].中国物理快报,2019(2). |
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| 作者姓名： | 王瑞 吴艳玲 余博晗 胡立立 顾长志 李俊杰 赵继民 |
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| 摘 要： | In conventional optics, the Fabry–Pérot(FP) effect is only considered for transparent materials at a macroscopic dimension. Down to the nanometer scale, for absorptive metallic structures, the FP effect has not been directly observed so far. It is unclear whether such a macroscopic effect still holds for a subwavelength metallic nanostructure. Here, we demonstrate the probing of FP interference in a series of nanometer-thick Au films with subwavelength hole arrays. The evidence from both linear and second harmonic generation signals, together with angle-resolved investigations, exhibit features of a FP effect. We also derive an absorptive FP interference equation, which well explains our experimental results. Our results for the first time experimentally confirm the long-persisting hypothesis that the FP effect holds ubiquitously in a metallic nanostructure.
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