Active organic optical waveguide materials (OOWMs) incorporating room temperature phosphorescence (RTP) hold significant promise for diverse applications in photonic and optoelectronic devices. Despite this potential, realizing active RTP optical waveguides with large-sized ordered structures and minimal light loss remains a formidable challenge. To address this issue, we present a groundbreaking thermoplastic active OOWM with low light loss, leveraging room temperature phosphorescent liquid crystalline polymer (LCP). This innovative material can be easily synthesized through the copolymerization of phosphorescent and liquid crystalline monomers. The resulting RTP copolymer exhibits a nematic liquid crystal phase with a phosphorescence lifetime of approximately 0.15 ms and an afterglow duration of around 1 second. Leveraging the excellent processability of LCP, we successfully produce meter-scale fibers via melt spinning. These RTP LCP fibers, characterized by a high orientation of mesogens along the fiber axis, demonstrate superior light confinement and efficient light conduction compared to unoriented samples, resulting in a low optical loss coefficient of 0.13 dB/mm. Furthermore, the thermal responsiveness of the RTP LCP optical waveguide enables its use as a photo switch. This pioneering work paves the way for the design of new OOWMs tailored for advanced photonics and optoelectronics devices.

结合室温磷光（RTP）的活性有机光波导材料（OOWM）为光子和光电器件的各种应用带来了巨大的前景。尽管有这种潜力，实现具有大尺寸有序结构和最小光损失的有源 RTP 光波导仍然是一个艰巨的挑战。为了解决这个问题，我们利用室温磷光液晶聚合物 (LCP) 提出了一种具有低光损失的突破性热塑性活性 OOWM。这种创新材料可以通过磷光和液晶单体的共聚轻松合成。所得RTP共聚物呈现出向列液晶相，磷光寿命约为0.15毫秒，余辉持续时间约为1秒。利用LCP优异的加工性能，我们通过熔融纺丝成功生产出米级纤维。这些 RTP LCP 光纤的特点是介晶沿光纤轴具有高取向，与未取向的样品相比，表现出卓越的光限制和高效的光传导，从而实现 0.13 dB/mm 的低光学损耗系数。此外，RTP LCP 光波导的热响应性使其能够用作光电开关。这项开创性的工作为专为先进光子学和光电子设备量身定制的新型 OOWM 的设计铺平了道路。