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<p>Integrated topological photonics is emerging as a versatile platform to control topological states of light. Although passive photonic devices have revealed fundamental principles of topological physics, their static configurations limit the investigation of dynamical topological phenomena, phase transitions and disorder effects. However, global controls implemented through nonlinear optical interactions and/or external excitations provide dynamic control of topological properties and precise engineering of non-Hermitian effects for optical routing, fast switching, active lasing and quantum light generation. Programmable photonic circuits offer site-resolved addressing and control of individual photonic atoms, enabling full dynamic manipulation of topological phases, controlled disorder engineering and access to a range of lattice geometries. Together, these approaches are transforming topological photonics from a platform for static demonstration into one for active, reconfigurable control. In this article, we review recent advances in reconfigurable and programmable integrated topological photonics, wherein global and site-resolved control techniques enable reprogrammable manipulation of photonic topological devices with one-dimensional to three-dimensional geometries for fundamental research and practical applications. We discuss future research directions to improve controllability and scalability, including multi-scale control, photon–photon interactions and heterogeneous integration.</p>

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Reconfigurable and programmable integrated topological photonics

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Anqi Ma,
  • Tianxiang Dai,
  • Guangzhen Li,
  • Luqi Yuan,
  • José Capmany,
  • Zhigang Chen,
  • Qihuang Gong,
  • Jianwei Wang

摘要

Integrated topological photonics is emerging as a versatile platform to control topological states of light. Although passive photonic devices have revealed fundamental principles of topological physics, their static configurations limit the investigation of dynamical topological phenomena, phase transitions and disorder effects. However, global controls implemented through nonlinear optical interactions and/or external excitations provide dynamic control of topological properties and precise engineering of non-Hermitian effects for optical routing, fast switching, active lasing and quantum light generation. Programmable photonic circuits offer site-resolved addressing and control of individual photonic atoms, enabling full dynamic manipulation of topological phases, controlled disorder engineering and access to a range of lattice geometries. Together, these approaches are transforming topological photonics from a platform for static demonstration into one for active, reconfigurable control. In this article, we review recent advances in reconfigurable and programmable integrated topological photonics, wherein global and site-resolved control techniques enable reprogrammable manipulation of photonic topological devices with one-dimensional to three-dimensional geometries for fundamental research and practical applications. We discuss future research directions to improve controllability and scalability, including multi-scale control, photon–photon interactions and heterogeneous integration.