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Appl. Sci. 2018, 8(2), 161; https://doi.org/10.3390/app8020161

High Q-Factor Resonance in a Symmetric Array of All-Dielectric Bars

Centre for THz Research, China Jiliang University, Hangzhou 310018, China
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Received: 30 December 2017 / Revised: 19 January 2018 / Accepted: 22 January 2018 / Published: 24 January 2018
(This article belongs to the Special Issue Dielectric Metamaterials)
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Abstract

Strong electrical dipole resonance (ER) with high quality-factor (Q) (over several thousands) in a simple silicon all-dielectric rod arrays without asymmetric structure is achieved in the near infrared (NIR) wavelength range. According to numerical simulations, strong high order ER is excited by vertical incident plane waves with electric fields polarized perpendicular to the rod instead of parallel. The electric field coupling between adjacent rods is greatly enhanced by increasing the length of the rods, and the radiative loss of the ER is significantly depressed, thus achieving high Q resonances. In the meantime, the electric field enhancement both inside and surrounding the rod are greatly improved, which is conducive to many applications. The proposed all-dielectric metasurface is simple, low loss, Complementary Metal Oxide Semiconductor (CMOS) compatible, and can be applied in many fields, such as sensing, narrowband filters, optical modulations, and nonlinear interactions. View Full-Text
Keywords: all-dielectric metasurface; rod resonator; high quality-factor (Q); field enhancement all-dielectric metasurface; rod resonator; high quality-factor (Q); field enhancement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Sui, C.; Li, X.; Lang, T.; Jing, X.; Liu, J.; Hong, Z. High Q-Factor Resonance in a Symmetric Array of All-Dielectric Bars. Appl. Sci. 2018, 8, 161.

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