高Q对比度的太赫兹量子级联激光器通过带隙限制的束状态在连续的连续
Hanyu Liu1,2, Jieyuan Cui1,3, Qian Wang2
1Centre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering & The Photonics Institute, Nanyang Technological University, 639798, Singapore, Singapore.
Nanophotonics (Berlin, Germany)
|October 27, 2025
概括
这项研究引入了一种新的太赫兹激光设计,可以增强Q对比度,以实现稳定的单模式操作. 在连续 (BIC) 激光器中光子束状态的这一突破,为各种应用提供了更好的性能.
科学领域:
- 光子学是指光子学的使用方法.
- 量子光学是一种量子光学.
- 激光物理 激光物理
背景情况:
- 连续体中的光子束状态 (BIC) 是具有高度局部化的光学模式.
- 传统的BIC激光器往往优先考虑Q-因子而不是Q-对比,从而阻碍了稳定的单模式激光.
- 对于激光稳定性来说,Q对比度,即BIC和竞争模式之间的Q因子差异,至关重要.
研究的目的:
- 为了呈现一个紧的BIC激光设计,具有高Q对比度.
- 为了证明在太赫兹 (THz) 模式下稳定的单模激光.
- 突出Q对比在光子激光器开发中的重要性.
主要方法:
- 优化了TM1带在核心和外领域的对齐,以限制高Q因子模式.
- 使用量子级联激光芯片进行THz操作.
- 通过战略性结构设计实现高Q对比.
主要成果:
- 展示了一个紧的BIC激光器,其Q对比率约为2.3.
- 在动态区域实现了稳定的单模式激光.
- 获得了~20dB的侧模式抑制比,确认了稳定的运行.
结论:
- 在光子激光器中实现稳定的单模激光时,Q对比起关键作用.
- 提出的设计为THz激光器,传感器和调制器提供了有前途的意义.
- 带对齐的战略优化是提高BIC激光性能的关键.
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