基于化的几何和传播元表面用于束排放
Meng-Hsin Chen1, Yan-Liang Liu1, Vin-Cent Su1
1Department of Electrical Engineering, National United University, Miaoli 36003, Taiwan.
Heliyon
|February 9, 2024
概括
这项研究展示了高效的化 (GaN) 超表面用于产生束. 一种类型达到99%的效率,而几何版本提供无色性能,克服分散限制.
科学领域:
- 光学和光子学 在光学和光子学.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 超表面为光特性提供了先进的控制.
- 波束在光学操纵和通信方面有应用.
- 化 (GaN) 是纳米光子学的一个有前途的材料.
研究的目的:
- 通过实验证明高效的几何和传播元表面用于束发射.
- 为了研究基于GaN的元原子的性能特性.
- 为了比较几何和传播元表面的波长依赖的行为.
主要方法:
- 制造具有高面积比的状和圆柱形GaN元原子.
- 测试地表效率和光束发射的实验性表征.
- 对强度分布和波长分散的分析.
主要成果:
- 通过类似的GaN元原子实现高达99%的交叉极化传输效率.
- 通过圆柱形的GaN元原子证明了97%的平均共极化传输效率.
- 观察到旋束发射的环状强度趋同.
- 几何超表面表现出超过100nm带宽的无色环状强度,与分散传播超表面不同.
结论:
- GaN超表面在产生束方面非常高效.
- 几何超表面提供无色束形状,克服传播超表面的局限性.
- 这些发现推动了可见光应用的先进光学元件的开发.
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