近日，美国斯坦福大学Eran Lustig团队研究了耗散微梳的正交相关晶格动力学。相关论文于2025年11月3日发表在《自然—光子学》杂志上。
具有真空波动参数放大的耦合网络由于其复杂的物理性质和潜在的应用前景而受到越来越多的关注。在这些系统中，参数相互作用导致分束器耦合和双模压缩，从而产生依赖于正交的动力学。这些系统可以建模为玻色子网络、阵列或晶格，表现出影响多模压缩的单向放大和非厄米手性输运等奇异效应。然而，在全光系统中通过实验探索和控制这些网络动力学仍然具有挑战性。集成非线性微谐振器的最新进展，被称为克尔微梳，已经能够在微芯片上产生和控制宽带高重复脉冲。克尔微梳表现出有趣的非线性动力学，相干光子占据离散谱线，导致多模压缩真空态。
研究组分析了耗散克尔微梳驱动真空涨落的晶格动力学。他们设计了一种光子芯片，在其上自发涌现的一对脉冲产生了参数放大真空波动的扩展多模态。这些状态表现出振荡动力学，暗示挤压和二次梳状形成。通过集成微加热器，研究组调整了真空波动以消除振荡，建立了非厄米晶格对称性和克尔梳之间的基本联系，并为具有广泛意义的量子和经典光子技术的奇异正交依赖光网络铺平了道路。
附：英文原文
Title: Quadrature-dependent lattice dynamics of dissipative microcombs
Author: Lustig, Eran, Guidry, Melissa A., Lukin, Daniil M., Fan, Shanhui, Vukovi, Jelena
Issue&Volume: 2025-11-03
Abstract: The study of coupled networks with parametric amplification of vacuum fluctuations has garnered increasing interest due to its intricate physics and potential applications. In these systems, parametric interactions lead to beam-splitter coupling and two-mode squeezing, creating quadrature-dependent dynamics. These systems can be modelled as bosonic networks, arrays or lattices, exhibiting exotic effects such as unidirectional amplification and non-Hermitian chiral transport that influence multimode squeezing. However, exploring and controlling these network dynamics experimentally in all-optical systems remains challenging. Recent advances in integrated nonlinear microresonators, known as Kerr microcombs, have enabled the generation and control of broadband high-repetition pulses on microchips. Kerr microcombs exhibit intriguing nonlinear dynamics where coherent photons occupy discrete spectral lines, leading to multimode squeezed vacuum states. Here we explore the lattice dynamics of vacuum fluctuations driven by dissipative Kerr microcombs. We design a photonic chip on which a spontaneously emergent pair of pulses creates extended multimode states of parametrically amplified vacuum fluctuations. These states exhibit oscillatory dynamics, with implications for squeezing and secondary comb formation. By employing integrated micro-heaters, we tune the vacuum fluctuations to eliminate the oscillations, establishing a fundamental connection between non-Hermitian lattice symmetries and Kerr combs, and paving the way for exotic quadrature-dependent optical networks with broad implications for quantum and classical photonic technologies.
DOI: 10.1038/s41566-025-01777-z
Source: https://www.nature.com/articles/s41566-025-01777-z