基于调制电子束泵浦钙钛矿量子点的白光瞬态光源

In this project, we would conduct a research of electron beam pumped high power white laser transient light source based on all-inorganic lead halide perovskite semiconductor quantum dots. The main job contents are shown as follows: explore the controllable synthesis method of CsPbX3 (X = I, Br, Cl) quantum dots by the quantum size effect and the composition variation based on energy band engineering and realize high quantum yield three-primary-color emissions. Construct the local surface plasma resonance enhanced perovskite quantum dots based white light materials by employing the RGB noble metal nanocrystal. On the other hand, further study the power-multiplication modulation mechanism and transient space optical transfer characteristics of electron beam pump based on the microchannel waveguide-gate structure. Reveal the physics mechanism of pulsed electron beam modulation power gain bandwidth. Establishing a three-dimensional model of space optical transfer and impulse response capabilities vary with the waveguide grid modulation ability .Reveal the influence of electronic optical system’s parameters on relationship between space optical transfer and pulse frequency response characteristics. The characteristic and innovation of this project lies in the employ of multiple metal plasma to realize the luminescence enhancement in the wide spectrum range and the improvement of modulated response speed, as well as to realize the high-frequency and high-power and high-space optical transfer transient light by bidirectional efforts including white laser and modulated pumping. The project belongs to the key object in optoelectronics and information field.

本课题拟基于钙钛矿量子点材料体系，实现电子束泵浦的高功率半导体白光激光瞬态光源，具体如下：从量子尺寸效应和能带工程两方面，实现CsPbX3(X=Cl,Br,I)量子点可控合成和高量子产率三基色发射；引入红绿蓝三种消光波长的贵金属纳米晶，构建金属局域表面等离子体共振增强的钙钛矿量子点白光复合体系；基于微通道波导栅型结构探究电子束泵浦源的功率倍增调制机理与瞬时空间光学传递特性，揭示脉冲电子束调制功率增益带宽积的物理本质，构建空间光学传递能力和脉冲频响传递能力随波导栅极调制能力变化的三维曲线关系模型，建立电子光学参数对其空间光学传递特性和脉冲频响特性的影响关系，设计构建调制电子束泵浦量子点激光原型器件。本课题的特色创新在于利用多种金属等离子体实现宽谱段荧光增强和提高调制响应速度，从白光激射与调制泵浦两个维度双向攻关、实现高功率高频响带宽高空间光学传递能力的瞬态光源，是光电信息领域的前沿课题。

本课题基于钙钛矿量子点材料体系，实现电子束泵浦的高功率半导体白光激光瞬态光源，具体如下：从量子尺寸效应和能带工程两方面，实现CsPbX3(X=Cl,Br,I)量子点可控合成和高量子产率三基色发射；引入红绿蓝三种消光波长的贵金属纳米晶，构建金属局域表面等离子体共振增强的钙钛矿量子点白光复合体系；基于微通道波导栅型结构探究电子束泵浦源的功率倍增调制机理与瞬时空间光学传递特性，揭示脉冲电子束调制功率增益带宽积的物理本质，构建空间光学传递能力和脉冲频响传递能力随波导栅极调制能力变化的三维曲线关系模型，建立电子光学参数对其空间光学传递特性和脉冲频响特性的影响关系，设计构建调制电子束泵浦量子点激光原型器件。本课题首次证实了钙钛矿量子点薄膜在电子束泵浦条件下可以实现随机激射，并通过实验证实了利用电子束泵浦钙钛矿量子点在太赫兹波段由非常高的低频辐射转化效率，这将为后续进一步研究基于电子束泵浦钙钛矿量子点的太赫兹功率型发射器件提供了前期基础。