Fano resonance induced by mode coupling in all-dielectric nanorod array

Fano resonance induced by mode coupling in all-dielectric nanorod array

We propose an efficient way to realize Fano-type resonances at optical frequencies based on a low-loss dielectric nanorod array. An ultrahigh Q factor (larger than 10000) is numerically demonstrated, which is attributed to the mode interference between the broadband Fabry-Perot (FP) resonance and th...

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Veröffentlicht in:Applied physics express 2014-03, Vol.7 (3), p.32002
Hauptverfasser: Pu, Mingbo, Song, Maowen, Yu, Honglin, Hu, Chenggang, Wang, Min, Wu, Xiaoyu, Luo, Jun, Zhang, Zuojun, Luo, Xiangang
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Sprache:eng
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Zusammenfassung:We propose an efficient way to realize Fano-type resonances at optical frequencies based on a low-loss dielectric nanorod array. An ultrahigh Q factor (larger than 10000) is numerically demonstrated, which is attributed to the mode interference between the broadband Fabry-Perot (FP) resonance and the narrowband guided mode stemming from coupled quadrupoles. A wide gap region for field enhancement is formed between adjacent rods, making such a structure an ideal platform for related applications such as biological sensing and nonlinear devices.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.7.032002