分形光子拓绝缘体
Tobias Biesenthal1, Lukas J Maczewsky1, Zhaoju Yang2
1Institut für Physik, Universität Rostock, Albert-Einstein-Straße 23, 18059 Rostock, Germany.
Science (New York, N.Y.)
|May 13, 2022
概括
研究人员展示了没有绝缘体的折叠拓绝缘体,证明了新型折叠光子网中受保护的边缘状态的存在. 这扩大了对拓物质的理解,并引入了拓分数.
科学领域:
- 凝聚物质物理学
- 光子学
- 材料科学
背景情况:
- 拓绝缘体是具有无散射边缘状态和绝缘体的物质状态.
- 绝缘体传统上被认为是定义拓性质的重要组成部分.
研究的目的:
- 为了研究仅由边缘位点组成的碎形拓绝缘体.
- 在缺乏散带的系统中实验验证拓保护边缘状态的存在.
主要方法:
- 使用螺旋波导排列成碎形图案的光子网的制造和研究.
- 对光传输和奇拉边缘状态的实验观测.
主要成果:
- 在没有散带的碎形拓绝缘体中实验证明拓保护的奇拉边缘状态.
- 与蜂巢网格相比,在拓分形系统中观察到增强的光传输速度.
结论:
- 在所有系统中,绝缘体并非对拓保护至关重要.
- 这些发现挑战了传统的批量边界对应,为拓分数开辟了新的途径,并扩大了对拓绝缘体的认识.
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