在准晶波导阵列的边缘观察光的定位
S K Ivanov1, S A Zhuravitskii2,3, N S Kostyuchenko2,3
1Universidad de Valencia, Instituto de Ciencia de los Materiales, Catedrático J. Beltrán, 2, 46980, Paterna, Spain.
Physical review letters
|April 7, 2025
概括
研究人员通过实验证明了光子准晶体边缘的光定位. 他们观察了线性局部状态和边缘单子在截断的Penrose曲波导阵列中,揭示了截断.
科学领域:
- 光子学和光的定位
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- 准晶体具有没有转换对称性的长距离秩序,提供独特的系统性质.
- 在光子准晶体体中的光传播已被理解,但边缘局部化在实验上仍然在很大程度上未被探索.
- 光子准晶体结构的削减显著影响光的行为.
研究的目的:
- 实验性地研究线性和非线性光定位在截断的光子准晶波导阵列的边缘.
- 从理论上分析截断半径对边缘光局部化的影响.
- 为了确认局部状态的存在,并观察非线性效应,包括边缘单子.
主要方法:
- 辐射切割的半晶波导阵列中的光传播的理论分析与非周期性Penrose.
- 实验性制造Penrose准晶阵列使用秒激光铭文.
- 单波导激发探测线性局部状态和非线性现象.
主要成果:
- 理论预测证实,特定的截断半径会导致在数组边缘定位的线性固有状态.
- 实验验证局部状态在femtosecond激光刻画的Penrose半晶阵列中的实验验证.
- 从线性局部状态过渡到边缘单子的观察,随着输入脉冲功率的增加.
结论:
- 准周期光子系统的选择性切断可以诱导显著的边缘光局部化现象.
- 这项研究提供了在截断的准晶体光子系统中首次实验证明局部化效应.
- 边缘单子在理论上被确定并通过实验观察,突出了非线性的作用.
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