Tunable interface state in one dimensional composite photonic structure

Tunable interface state in one dimensional composite photonic structure
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一维复合光子结构中的可调谐界面态

DOI:
10.1016/j.optcom.2019.124324
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发表时间:
2019-12
影响因子:
2.4
通讯作者:
Xia Wang
Xia Wang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Dong Gao;Weitao Mao;Ranran Zhang;Jing Liu;Qiuling Zhao;Wing Yim Tam;Xia Wang

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基于传递矩阵法(TMM),我们评估了界面状态的条件和可控性。在由两个二元层状光子晶体PCI和PCII组成的一维光子结构中,具有。相同的光子带隙,但不同的单位电池。对于具有反转对称但不同对称的pc。在中心,复合光子结构在相应带隙的中间呈现界面态。其中pc的反射相位之和为零。观察到的界面状态即使在。只要移动单个PC的单元格,就会打破反转对称性。反射相位仍然为零。此外,可以控制带隙内界面状态的位置。通过调整两台pc机接口处相邻层的厚度。采用标准电子束蒸发技术可以很容易地实现复合光子结构,从而开辟了更多的应用前景。在多通道窄带滤波器等光学调制器件中。
Based on the Transfer Matrix method (TMM), we evaluate the conditions and controllability of interface states.in one-dimensional photonic structures composed of two binary layered photonic crystals, PCI and PCII, having.the same photonic bandgaps but different unit cells. For PCs with inversion symmetry but different symmetry.centers, the composite photonic structure exhibits interface states in the middle of the corresponding bandgaps.where the sum of the reflection phases of the PCs is zero. The observed interface states persist even when.the inversion symmetry is broken by shifting the unit cell of the individual PC as long as the sum of the.reflection phases is still zero. Moreover, the location of interface states inside the bandgaps can be controlled.by adjusting the thicknesses of the adjacent layers at the interface of two PCs. The composite photonic structure.can be realized easily by standard electron beam evaporation technology, opening more possible applications.in multi-channel narrowband filters and other optical modulation devices.
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