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arXiv 2407.04062physics.optics
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纳米激光器之间相位延迟耦合实现的单模发射

Single-mode emission by phase-delayed coupling between nano-lasers

T. V. Raziman, Anna Fischer, Riccardo Nori, Anthony Chan, Wai Kit Ng, Dhruv Saxena, Ortwin Hess, Korneel Molkens, Ivo Tanghe, Pieter Geiregat, Dries Van Thourho… 展开作者

T. V. Raziman, Anna Fischer, Riccardo Nori, Anthony Chan, Wai Kit Ng, Dhruv Saxena, Ortwin Hess, Korneel Molkens, Ivo Tanghe, Pieter Geiregat, Dries Van Thourhout, Mauricio Barahona, Riccardo Sapienza

AI总结:

本文提出利用相位延迟耦合实现纳米激光器稳定单模发射,通过分离模式阈值,适用于阵列,提升亮度与稳定性,助力光子芯片应用。

摘要:

纳米激光器之间的近场耦合能够实现集体高功率激射,但会导致复杂的光谱重塑和多模运行,从而限制发射亮度、空间相干性和时间稳定性。基于对称性、拓扑或干涉的多种激射架构已被提出以规避此限制。我们展示了一种更简单且稳健的方法,利用相位延迟耦合(即激光器交换的光携带相位)可实现稳定的单模运行。相位延迟耦合改变了模式放大:对于接近任意子宇称-时间(PT)对称奇异点的泵浦功率,高相位延迟完全分离了模式阈值,从而实现单模运行。这通过两个耦合纳米激光器的非线性耦合模式理论和随机微分方程的稳定性分析得以展示,并由激射纳米球二聚体的实际半解析处理所证实。最后,我们将模式控制扩展到大型纳米激光器阵列,实现了更低的阈值和更高的功率。我们的工作为从纳米激光器阵列工程化明亮且稳定的单模激射提供了一种新颖解决方案,在用于通信和激光雷达的光子芯片中具有重要应用。

英文摘要:

Near-field coupling between nanolasers enables collective high-power lasing but leads to complex spectral reshaping and multimode operation, limiting the emission brightness, spatial coherence and temporal stability. Many lasing architectures have been proposed to circumvent this limitation, based on symmetries, topology, or interference. We show that a much simpler and robust method exploiting phase-delayed coupling, where light exchanged by the lasers carries a phase, can enable stable single-mode operation. Phase-delayed coupling changes the modal amplification: for pump powers close to the anyonic parity-time (PT) symmetric exceptional point, a high phase delay completely separates the mode thresholds, leading to single mode operation. This is shown by stability analysis with nonlinear coupled mode theory and stochastic differential equations for two coupled nanolasers and confirmed by realistic semi-analytical treatment of a dimer of lasing nanospheres. Finally, we extend the mode control to large arrays of nanolasers, featuring lowered thresholds and higher power. Our work promises a novel solution to engineer bright and stable single-mode lasing from nanolaser arrays with important applications in photonic chips for communication and lidars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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