近日，西班牙基础物理研究所的A. Muñoz de las Heras及其研究团队取得一项新进展。经过不懈努力，他们揭示驱动耗散光子晶格中的非线性局域化。相关研究成果已于2024年6月28日在国际知名学术期刊《物理评论A》上发表。
该研究团队深入探讨了标准光学克尔非线性（如极化晶格中常见的非线性）影响下的这种局域化体系，并揭示这些体系能在与线性体系截然不同的频率下稳定地驱动耗散局域化。此外，研究人员发现，与直觉相反，在大多数情况下，由于总体强度同时降低，这种驱动耗散局域化不会增强光学双稳定性等非线性效应。然而，他们也成功识别出某些参数区域，在这些区域中通过来自不同点的发射光产生相长干涉，从而实现了非线性的增强。
据悉，最近的实验工作已经证明在有耗光子晶格中实现可重构光子定位的能力，方法是在特定位置用激光连续驱动有耗光子晶格。这种定位是由不同位置发出的光在特定频率下产生的完美相消干涉所造成的，因此它只会在非常特定的频率上发生。
附：英文原文
Title: Nonlinearity-enabled localization in driven-dissipative photonic lattices
Author: A. Munoz de las Heras, A. Amo, A. González-Tudela
Issue&Volume: 2024/06/28
Abstract: Recent experimental work has demonstrated the ability to achieve reconfigurable photon localization in lossy photonic lattices by continuously driving them with lasers strategically positioned at specific locations. This localization results from the perfect destructive interference of light emitted from different positions and, because of that, occurs only at very specific frequencies. Here we examine this localization regime in the presence of standard optical Kerr nonlinearities, such as those found in polaritonic lattices, and show that they stabilize driven-dissipative localization in frequencies different from those observed in the linear regime. Moreover, we demonstrate that, contrary to intuition, in most situations this driven-dissipative localization does not enhance nonlinear effects like optical bistabilities, due to a concurrent reduction in overall intensities. Nevertheless, we are able to identify certain parameter regions where nonlinear enhancement is achieved, corresponding to situations where emission from different spots constructively interferes.
DOI: 10.1103/PhysRevA.109.063523
Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.109.063523
