在圆柱状颗粒晶体中连续体中的带的束状态
Yeongtae Jang1, Seokwoo Kim1, Dongwoo Lee1
1Pohang University of Science and Technology (POSTECH), Department of Mechanical Engineering, Pohang 37673, Republic of Korea.
Physical review letters
|April 18, 2025
概括
我们展示了连续性 (BIC) 中的约束状态可以在紧的共振器中定位并可控地过渡到准BIC. 这使得周期结构中形成平面带,呈现高Q共振.
科学领域:
- 声学 声学 声学 声学
- 凝聚物质物理学 凝聚物质物理学
- 机械工程 机械工程
背景情况:
- 连续性的边界状态 (BIC) 是独特的波浪现象,在各种领域都有潜在的应用.
- 紧共振器中局部化的BIC具有挑战性,难以实现和控制.
- 颗粒状晶体提供可调节的机械性能.
研究的目的:
- 理论上研究和实验证明在紧型固体共振器中对极化保护BICs的定位.
- 在机械系统中探索BIC和准BIC之间可控制的过渡.
- 为了研究由BIC支共振器组成的周期结构中结合带的形成.
主要方法:
- 在圆柱状颗粒晶体中对BIC特性进行理论研究.
- 使用可调节的颗粒晶体机械系统进行实验.
- 在现场调节接触边界以控制BIC-准BIC过渡.
- 激光多普勒振动测量用于测量有限链中的共振特性.
主要成果:
- 在紧的固体共振器中,极化保护BIC的完整定位.
- 通过调整共振器边界,从BIC到准BIC的可控过渡.
- 在一个有限的连锁共振器中出现一个准绑定 (平面) 带,其对称性被打破.
- 在链中的所有共振器中观察高Q和无分散共振.
结论:
- 紧型固体共振器可以有效地支持和定位BIC.
- 颗粒状晶体系统为探索BIC现象和转变提供了一个可调的平台.
- 在周期结构中形成平面波段和高Q共振,为新浪波操纵和能量定位开辟了道路.
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