Authors: Zhengqi Liu Guolan Fu Zhenping Huang Jing Chen Xiaoshan Liu
Publish Date: 2016/06/27
Volume: 12, Issue: 3, Pages: 577-582
Abstract
Alldielectric resonant structure ADRS consisting of highindex nonlinear dielectrics has been theoretically and numerically demonstrated with multiband ultrasharp transmission response in this work Bandwidth down to subnanometer and spectral Qfactor up to 920 are achieved in this ADRSbased metamateriallike platform Strong resonant electric field distributions by the highindex dielectric resonators and efficient coupling between the layered dielectric particles and the cavity mainly contribute to the multiple narrowband light transmission filtering By using a Kerr nonlinear medium as the resonant dielectric the positions of the transmission dips in the spectrum can be actively tuned by the incident light intensity Due to the ultranarrow spectral feature and the strong electric field distribution by the resonators an efficient alloptical switching behavior with high spectral difference intensity and contrast ratio is obtained Further study presents the observed multiband transmission with high scalability by tuning the structural parameters These optical features hold the predicted ADRS be potentially applied to constructing dielectric metamaterialbased alloptical switching or active subtractive transmission filtering with low power threshold at subdiffraction scaleThe work supported from National Natural Science Foundation of China Grants 11464019 11264017 11564017 and 11304159 Young Scientist Development Program of Jiangxi Province Grant 20142BCB23008 Natural Science Foundation of Jiangxi Province Grant 20142BAB212001
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