通过在尼奥比特晶体中的分叉格子阵列有效生成分离八度轨道角动量束
Xinyu Liu1, Dan Wei2, Chun Chang1
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou 510275, China.
Nanophotonics (Berlin, Germany)
|December 5, 2024
概括
研究人员使用新酸平台在基本和第二波长产生了多个轨道角动量 (OAM) 束. 这一进步提高了光通信和数据存储能力.
科学领域:
- 非线性光学是非线性光学.
- 光子晶体的光子晶体
- 结构化灯光 结构化灯光
背景情况:
- 光的轨道角动量 (OAM) 对基础物理学和光通信等应用至关重要.
- 组合用于OAM生成的方案提供了增加通信道的潜力,但在转换效率方面存在困难.
- 酸非线性光子晶体为操纵光特性提供了一个多功能平台.
研究的目的:
- 为了证明在基本和第二波 (SH) 波长的多个OAM光束的生成.
- 使用线性和非线性布拉格衍射 (准相匹配) 增强OAM光束生成.
- 探索在光通信中并行检测OAM状态的潜力.
主要方法:
- 使用一个三维分叉格子阵列,在尼酸盐非线性光子晶体中具有空间χ(1)和χ(2)分布.
- 在基本的OAM光束增强中采用线性布拉格衍射.
- 采用非线性布拉格衍射 (准相匹配) 用于SH OAM光束增强.
主要成果:
- 在基本和SH波长上成功生成了多个OAM光束.
- 对线性OAM光束实现了60.45%的高转换效率.
- 经过证明的非线性OAM光束生成,效率为1.08 × 10-4 W-1.
结论:
- 开发的方法允许波长或角度调整,以增强具有可变拓电荷的OAM光束.
- 这项工作为OAM状态的并行检测提供了一个有前途的方法,推进了光通信.
- 这些发现超越了OAM,通过级联线性和非线性过程对结构光的更广泛的控制.
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