近日，哈尔滨工业大学宋清海团队通过连续体中的束缚态实现动态可调的远程耦合。2025年8月18日，《光：科学与应用》杂志发表了这一成果。

腔间强耦合的形成和动态控制是实现先进功能光子和量子电路的必要条件。特别是对于距离较远或任意位置的空腔。传统方法存在耦合距离短、可控性差、位置固定、波长均匀性低等缺点，严重限制了光子和量子网络的可扩展性。

研究组利用连续介质中光学束缚态（BIC）的固有优势，展示了一种用于远程耦合腔的一体化解决方案。BIC超表面可以在任意位置支持一系列有限尺寸的准BIC微激光器。准BIC微激光器具有相同的波长，并通过BIC超表面进行固有连接。因此，实验中的耦合距离从亚波长到几十微米显著增加。BIC超表面中的这种远程相互作用实现了缩放到二维结构和超快速控制内部激光作用，例如非厄米零模激光。这项研究将促进可扩展和可重构光子网络的发展。

附：英文原文

Title: Dynamically tunable long-range coupling enabled by bound state in the continuum

Author: Tang, Haijun, Huang, Can, Wang, Yuhan, Jiang, Xiong, Jin, Ruiheng, Cui, Yue, Xiao, Shumin, Song, Qinghai

Issue&Volume: 2025-08-18

Abstract: Formation and dynamic control of strong coupling among cavities are essential to realize advanced functional photonic and quantum circuits. Especially for cavities at distant distance or arbitrary locations. Conventional approaches suffer from short coupling distance, poor controllability, fixed locations and low wavelength uniformity, significantly restricting the scalability of photonic and quantum networks. Here, we exploit the intrinsic advantages of optical bound state in the continuum (BIC) and demonstrate an all-in-one solution for long-range coupled cavities. BIC metasurface can support a series of finite-sized quasi-BIC microlasers at arbitrary locations. The quasi-BICs microlasers have the same wavelength and are inherently connected through BIC metasurface. Consequently, the coupling distances in experiment increase significantly from subwavelength to tens of micrometers. Such long-range interaction in BIC metasurface enables scaling to two-dimensional architectures and ultrafast control of internal laser actions, e.g., non-Hermitian zero-mode lasing. This research shall facilitate the advancement of scalable and reconfigurable photonic networks.

DOI: 10.1038/s41377-025-01975-y

Source: https://www.nature.com/articles/s41377-025-01975-y