Chinese Optics Letters, Volume. 14, Issue 1, 011601(2016)

Tailoring magnetic and electric resonances with dielectric nanocubes for broadband and high-efficiency unidirectional scattering

Yong Wang, Xianghao Zeng, Erchan Yang, Yonghua Lu, Douguo Zhang, and Pei Wang*
Author Affiliations
  • Department of Optics and Optical Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China
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    Figures & Tables(5)
    (a) Numerical simulation result of the scattering spectra. The inset shows a schematic diagram of the problem. (b) Electromagnetic field distribution at MD resonance (λ=1105 nm). (c) Electromagnetic field distribution at ED resonance (λ=821 nm). (d) Electromagnetic field distribution at MQ resonance (λ=730.8 nm).
    Scattering spectra of the nanocuboid with different h, l, and w ranging from 160 to 30 nm. The inset shows the schematic diagram of the problem.
    (a) Scattering spectra of the nanocuboid with l=w=160 nm and h=72 nm. The inset shows the schematic diagram of the geometry. The far-field scattering pattern at (b) the resonance frequency (λ=693 nm) and (c) the off-resonance frequency (λ=800 nm).
    (a) Scattering spectra of the nanocuboid with h=w=160 nm and l=32 nm. The inset shows the schematic diagram of the geometry. The far-field scattering pattern at (b) the resonance frequency (λ=354 nm) and (c) the off-resonance frequency (λ=343 nm).
    (a) Transmittance of forward scattering (red line) and backward scattering (blue line) of 30 nm gap. (b) Ratio of forward scattering to total scattering. Red solid line corresponds to the case of the 30 nm gap, the dark blue corresponds to the 20 nm gap, the light blue to the single isolated nanocuboid, and the dashed line to the ratio of 95%. Far-field scattering pattern at 777.4 nm in (c) xz-plane and (d) yz-plane. The inset shows the schematic of the problem.
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    Yong Wang, Xianghao Zeng, Erchan Yang, Yonghua Lu, Douguo Zhang, Pei Wang. Tailoring magnetic and electric resonances with dielectric nanocubes for broadband and high-efficiency unidirectional scattering[J]. Chinese Optics Letters, 2016, 14(1): 011601

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    Paper Information

    Category: Materials

    Received: Sep. 29, 2015

    Accepted: Nov. 19, 2015

    Published Online: Aug. 6, 2018

    The Author Email: Pei Wang (wangpei@ustc.edu.cn)

    DOI:10.3788/COL201614.011601

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