A miniature laser with linear polarization is a long sought-after component of photonic integrated circuits. In particular, for multiwavelength polarization lasers, it supports simultaneous access to multiple, widely varying laser wavelengths in a small spatial region, which is of great significance for advancing applications such as optical computing, optical storage, and optical sensing. However, there is a trade-off between the size of small-scale lasers and laser performance, and multiwavelength co-gain of laser media and multicavity micromachining in the process of laser miniaturization remain as significant challenges. Herein, room-temperature linearly polarized multiwavelength lasers in the visible and near-infrared wavelength ranges are demonstrated, by fabricating random cavities scattered with silica in an Er-doped Cs₂Ag_0.4Na_0.6In_0.98Bi_0.02Cl₆ double-perovskite quantum dots gain membrane. By regulating the local symmetry and enabling effective energy transfer in nanocrystals, multiwavelength lasers with ultralow thresholds are achieved at room temperature. The maximum degree of polarization reaches 0.89. With their advantages in terms of miniaturization, ultralow power consumption, and adaptability for integration, these lasers offer a prospective light source for future photonic integrated circuits aimed at high-capacity optical applications.

中文翻译：

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溶液处理量子点中的线性偏振宽带发射和多波长激光


具有线性偏振的微型激光器是光子集成电路中长期以来备受追捧的组件。特别是对于多波长偏振激光器，它支持在较小的空间区域内同时访问多个、广泛变化的激光波长，这对于推进光计算、光存储和光传感等应用具有重要意义。然而，小型激光器的尺寸和激光性能之间存在着权衡，激光介质的多波长共增益和激光小型化过程中的多腔微加工仍然是重大挑战。在此，通过在掺铒的 Cs ₂ Ag _0.4 Na 中制造二氧化硅散射的随机腔，演示了可见光和近红外波长范围内的室温线偏振多波长激光器 _0.6 中 _0.98 Bi _0.02 Cl ₆ 双钙钛矿量子点增益膜。通过调节局部对称性并实现纳米晶体中的有效能量转移，可以在室温下实现具有超低阈值的多波长激光器。最大偏振度达到0.89。这些激光器凭借其小型化、超低功耗和集成适应性方面的优势，为未来面向高容量光学应用的光子集成电路提供了有前景的光源。