| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Absorptive Fabry–Pérot Interference in a Metallic Nanostructure |
| Rui Wang1, Yan-Ling Wu2, B. H. Yu2,3, Li-Li Hu2, C. Z. Gu2,3, J. J. Li2,3, Jimin Zhao2,3,4** |
1CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190
2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049
4Songshan Lake Materials Laboratory, Dongguan 523808
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| Cite this article: |
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Rui Wang, Yan-Ling Wu, B. H. Yu et al 2019 Chin. Phys. Lett. 36 027801 |
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Abstract 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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Received: 24 October 2018
Published: 22 January 2019
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| PACS: |
78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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42.65.-k
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(Nonlinear optics)
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| Fund: Supported by the National Key Research and Development Program of China under Grant Nos 2017YFA0303603 and 2016YFA0300303, the National Natural Science Foundation of China under Grant Nos 11504062, 11774408 and 11574383, the Strategic Priority Research Program of Chinese Academy of Sciences under Grant No XDB30000000, the Chinese Academy of Sciences Interdisciplinary Innovation Team, and the External Cooperation Program of Chinese Academy of Sciences under Grant No GJHZ1826. |
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