Wavelength tunable continuous wave metal halide perovskite lasers (PEROLAS)

该提案旨在通过开发基于卤化铅的钙钛矿（LHP）光学增益材料和适当的工程化器件结构，实现可见光至近红外光谱范围内的可溶液加工的连续波（CW）光泵浦激光器。特别注意的是可调谐性和激光器在绿色光谱范围内没有充分涵盖目前的III-V族半导体技术。我们预见未来的应用集成激光源在传感和计量应用和先进的显示技术，例如虚拟现实（VR），增强现实（AR）显示。该提案提出了一个协调的计划，以优化激光在LHP。该计划从更深入地了解限制LHP增益的物理过程开始，通过优化材料以缓解已确定的瓶颈，并以模拟，设计和制造与分布反馈谐振器一起工作的激光器结束。我们的物理理解，材料优化和器件工程工作的起点将是三重阳离子和甲基铵LHP层，我们已经报道了脉冲激发下的激光。在LHP增益的基本理解，我们的建议将产生的基础上，不同的LHP组合物（最初集中在不同的阳离子）的比较研究，是显着的相关性在最近的报告CW激光在100 K的单阳离子甲基铵材料。到目前为止，允许该材料在100 K（具有混合的正交-四方晶系相）下产生激光但在更高温度下不产生激光的物理机制尚不清楚。我们开始的比较研究将建立基本的物理过程（例如，阳离子旋转自由）在维持激光连续波激发下的重要性，并产生具体的洞察如何LHP材料应开发支持CW激光在更高的温度。通过结合材料开发、材料表征和激光设备设计方面的专业知识，项目团队拥有广泛的经验来执行拟议的工作。

This proposal aims to realize solution-processable, continuous-wave (CW) optically-pumped lasers across the visible to the near infrared spectrum by developing lead-halide-based perovskite (LHP) optical gain materials and appropriately engineering device structures. Particular attention is given to tunability and to lasers in the green spectral range not adequately covered by current III-V semiconductor technology. We foresee future applications as integrated laser sources in sensing and metrology applications and in advanced display technologies, e.g. for virtual-reality (VR), and augmented-reality (AR) displays.This proposal presents a coordinated plan to optimize lasing in LHPs. The plan starts from the development of a deeper understanding of the physical processes limiting gain in LHPs, moves through an optimization of the materials aimed at alleviating the identified bottlenecks, and ends with the simulation, design and fabrication of lasers operating with distributed feedback resonators. The starting point for our physical understanding, material optimization, and device engineering work will be the triple cation and methylammonium LHP layers from which we have already reported lasing under pulsed excitation. The fundamental understanding of gain in LHPs that our proposal will generate, based on the comparative study of different LHP compositions (initially focusing on the different cations), is of significant relevance in light of the very recent report of CW lasing at 100 K from the single-cation methylammonium material. As of yet, the physical mechanisms that allow the material to lase at 100 K (with a mixed orthorhombic-tetragonal phase) but not at higher temperatures are unclear. Our starting comparative studies will establish the importance of fundamental physical processes (e.g, cation rotational freedom) in maintaining lasing under CW excitation and generate specific insight into how LHP materials should be developed to support CW lasing at higher temperatures. By combining expertise regarding material development, material characterization, and laser device design the project team has the breadth of experience to execute the proposed work.