发表机构
Nanjing University; Chinese Academy of Sciences（南京大学; 中国科学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究基于PC-GL-DBR异质结构，利用连续谱中的平带束缚态实现低阈值电泵浦矢量涡旋激光，为集成结构光源与拓扑光子学提供了可行方案。
AI 中文摘要
连续谱中的束缚态（BICs）为实现高品质因子（Q）谐振器和拓扑结构光产生提供了可靠途径。尽管光泵浦BIC激光器已取得显著进展，但由于光限制与载流子注入的需求相互矛盾，实现电泵浦涡旋激光器仍具挑战。本研究展示了一种基于光子晶体-导波层-分布布拉格反射镜（PC-GL-DBR）异质结构的电泵浦矢量涡旋激光器：光子晶体平板可精确调控BIC模式的对称性与色散，包括平带BIC态；中间导波层可在不直接对多量子阱有源区进行图案化的前提下实现光模式工程，同时保留高效载流子注入与强光限制。在光泵浦条件下，该器件实现了单模激光，其Q值为9700，阈值为0.129 kW/cm²，边模抑制比为26 dB。关键的是，该器件在室温下实现了电泵浦涡旋激光，开启电压低至1.8 V，阈值电流密度为0.13 kA/cm²，腔Q值为8600，成功保留了拓扑BIC态的特征矢量涡旋发射。这些结果为集成结构光源与拓扑光子学领域的电驱动BIC涡旋激光器建立了可行途径。
英文摘要
Bound states in the continuum (BICs) offer a robust route toward high-Q resonators and topological structured-light generation. While optically pumped BIC lasers have advanced significantly, realizing electrically pumped vortex lasers remains challenging due to conflicting requirements for optical confinement and carrier injection. Here, we demonstrate an electrically pumped vector vortex laser based on a photonic crystal-guiding layer-distributed Bragg reflector (PC-GL-DBR) heterostructure. The photonic crystal slab precisely tailors the symmetry and dispersion of BIC modes, including a flatband BIC state, while an intermediate guiding layer enables optical mode engineering without directly patterning the multiple-quantum-well active region, preserving efficient carrier injection and strong optical confinement. Under optical pumping, the device achieves single-mode lasing with a Q of 9700, a threshold of 0.129 kW/cm$^2$, and a side-mode suppression ratio of 26 dB. Crucially, room-temperature electrically pumped vortex lasing is achieved with a low turn-on voltage of 1.8 V, a threshold current density of 0.13 kA/cm$^2$, and a cavity Q of 8600, successfully preserving the characteristic vector-vortex emission of the topological BIC state. These results establish a practical route toward electrically driven BIC vortex lasers for integrated structured-light sources and topological photonics.
Comments10 pages, 5 figures
