智利大学Luis E. F. Foa Torres团队研究了光子学中的非对称渐逝耦合。相关论文发表在2025年4月8日出版的《物理评论A》杂志上。

不对称相互作用在自然界中无处不在，在物理学中，对它们的研究成为基础。尽管渐逝耦合在物理学中很普遍，但很少有人关注波函数轮廓，出于实际原因，通常假设对称的互易相互作用。

这项工作通过分析证明了光子平台中非对称耦合的起源，重点研究了相邻波导的渐逝尾的行为，从而挑战了这一假设。课题组通过研究通过飞秒激光写入制造的失谐光子定向耦合器，实验验证了非对称动力学，并通过连续的数值模拟证实了该发现。

附：英文原文

Title: Nonsymmetric evanescent coupling in photonics

Author: Rodrigo A. Vicencio, Diego Román-Cortés, Martín Rubio-Saldías, Paloma Vildoso, Luis E. F. Foa Torres

Issue&Volume: 2025/04/08

Abstract: Asymmetrical interactions are ubiquitous in nature, and in physics their study becomes fundamental. Despite the prevalence of evanescent coupling in physics, little attention has been paid to wave function profiles, with symmetrical reciprocal interactions often assumed for practical reasons. This work challenges that assumption by analytically demonstrating the origin of nonsymmetrical coupling in a photonic platform, focusing on the behavior of evanescent tails from adjacent waveguides. We experimentally validate an asymmetrical dynamics by studying detuned photonic directional couplers, fabricated via femtosecond laser writing, and corroborate our findings through continuous numerical simulations.

DOI: 10.1103/PhysRevA.111.043510

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.043510