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Open AccessArticle

The Interference Pattern of Plasmonic and Photonic Modes Manipulated by Slit Width

Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
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Nanomaterials 2020, 10(4), 730; https://doi.org/10.3390/nano10040730
Received: 20 March 2020 / Revised: 6 April 2020 / Accepted: 9 April 2020 / Published: 11 April 2020
(This article belongs to the Special Issue Nano-Engineered Plasmonic Nanomaterials)
We demonstrate that the interference pattern of the plasmonic and photonic modes can be controlled by changing the slit width of a square slit structure. Based on the analyses of the plasmonic and photonic modes of slits with different widths, we theoretically derived the expressions of wavefield generated by a square slit. A far-field scattered imaging system is utilized to collect the intensity distribution experimentally. Various interference patterns, including stripes, square-like lattice array, and diamond-like lattice array, have been observed by adjusting the slit widths. In addition, the results were validated by performing finite-difference time-domain simulations, which are consistent with the theoretical and experimental results. View Full-Text
Keywords: surface plasmon; interference pattern; polarization; slit width surface plasmon; interference pattern; polarization; slit width
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MDPI and ACS Style

Li, X.; Tang, J.; Zhang, X.; Zhang, R.; Zeng, X.; Zhan, Z.; Liu, C.; Cheng, C. The Interference Pattern of Plasmonic and Photonic Modes Manipulated by Slit Width. Nanomaterials 2020, 10, 730.

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