arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1509.09019physics.optics
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光子纳米结构Dirac点附近光的横向安德森局域化

Transverse Anderson localization of light near Dirac points of photonic nanostructures

Hanying Deng, Xianfeng Chen, Boris A. Malomed, Nicolae C. Panoiu, Fangwei Ye

摘要:

我们对无序层状光子纳米结构中光束的安德森局域化进行了比较研究,在周期性层分布的限制下,在波矢谱中具有狄拉克点或布拉格带隙。特别是,我们表明,当布拉格间隙的宽度减小时,安德森模式的本地化长度增加,使得在极小的带隙限制中,即当形成狄拉克点时,即使是极高水平的紊乱也无法本地化位于狄拉克点附近的光学模式。本文还比较分析了在布拉格带隙或狄拉克点附近形成的安德森模的传播特性。我们的研究结果可以提供有价值的指导方针,在评估结构紊乱的功能广泛的阵列的光学纳米器件的影响。

英文摘要:

We perform a comparative study of the Anderson localization of light beams in disordered layered photonic nanostructures that, in the limit of periodic layer distribution, possess either a Dirac point or a Bragg gap in the spectrum of the wavevectors. In particular, we demonstrate that the localization length of the Anderson modes increases when the width of the Bragg gap decreases, such that in the vanishingly small bandgap limit, namely when a Dirac point is formed, even extremely high levels of disorders are unable to localize the optical modes located near the Dirac point. A comparative analysis of the key features of the propagation of Anderson modes formed in the Bragg gap or near the Dirac point is also presented. Our findings could provide valuable guidelines in assessing the influence of structural disorder on the functionality of a broad array of optical nanodevices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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