Simultaneous localization of photons and phonons within the transparency bands of LiNbO3 phoxonic quasicrystals.
Simultaneous localization of photons and phonons within the transparency bands of LiNbO3 phoxonic quasicrystals.
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DOI：
10.1364/oe.24.023353
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发表时间：
2016-10
期刊：
影响因子：
3.8
通讯作者：
Zhong Wang;Wenxing Liu;Tianbao Yu;Tongbiao Wang;Haoming Li;N. Liu;Q. Liao
中科院分区：
文献类型：
--
作者：
Zhong Wang;Wenxing Liu;Tianbao Yu;Tongbiao Wang;Haoming Li;N. Liu;Q. Liao
报道了八重铌酸锂（LiNbO 3）光子准晶（PhXQC）的声子-光子双带隙和局域模性质。尽管LiNbO_3衬底的折射率很低，但很容易实现完整的大光子带隙。有意引入的点缺陷可以在很宽的几何参数范围内在禁带和透明带内形成局域模。进一步的分析表明，透明带内的局域模起源于准周期结构的固有高阶旋转对称性，类似于回音壁模。LiNbO 3 PhXQC提供了一个很好的候选人，以增强声子-光子相互作用，并显示出相当大的优势，比周期性的同行。
We report the properties of dual phononic-photonic band gaps and localized modes of eightfold lithium niobate (LiNbO3) phoxonic quasicrystals (PhXQCs). Complete and large phoxonic band gaps are easily achieved despite the low refractive index of LiNbO3 substrate. Point defect intentionally introduced can form localized modes within both forbidden and transparency bands over a wide range of geometric parameters. Further analysis indicates that the localized modes within transparency bands originate from the intrinsic high-order rotational symmetry of quasiperiodic structures, which resemble whispering gallery modes. LiNbO3 PhXQCs provide a good candidate to enhance phononic-photonic interaction and show considerable advantage over the periodic counterparts.