在半导体元表面的超快速Q提升.
Ziwei Yang1,2, Mingkai Liu1, Daria Smirnova1
1ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronics Materials Engineering, Research School of Physics, Australian National University, Canberra, ACT 2600, Australia.
Nanophotonics (Berlin, Germany)
|December 5, 2024
概括
我们展示了一种用于提高半导体元表面的质量因子 (Q-因子) 的新方法,使用 femtosecond 激光脉冲. 这种技术可以动态减少光学损失,为频率转换和捕捉光的应用实现显著的Q提升.
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
- 半导体物理 半导体物理
背景情况:
- 半导体元表面的全光学调性使得变化时间的光学效应,如频率转换,成为可能.
- 在全光学过程中的光学吸收限制了地表质量因子 (Q-因子) 的动态增强.
研究的目的:
- 提出并从数值上演示一种方法,用于在单材料元表面中显著的Q提升.
- 通过光学送来实现对超表面共振带宽的动态控制.
主要方法:
- 使用结构化,在五秒时间尺度上动态降低结构性异构性.
- 利用化 (GaAs) 半导体中的带填充效应来减轻自由载体诱导的光学损失.
主要成果:
- 实现了超过数量级的Q提升,仅限于自由载体放松时间.
- 证明了对超表面的共振带宽的完全动态控制.
结论:
- 拟议的方法提供了一条途径,以克服全光超表面调整的基本局限性.
- 这种方法解锁了在先进的频率转换和光捕捉技术中的潜在应用.
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