新型可调谐胶体量子点/微腔复合体系低维光场调控和耦合物理效应研究

面向先进光学功能材料应用，开展深层次外加辐射光源/微腔复合体系的设计、制备、调制光谱特性及光场低维调控是当前光学微腔领域的研究热点，对未来新型微腔基光电子器件的开发应用具有非常重要的意义。本项目基于II-VI族胶体量子点的优异光学性能，利用溶胶-凝胶化学合成的过程特点，结合先进飞秒激光三维直写技术，实现高品质量子点/微腔复合体系。通过多维分辨显微荧光探测和时间关联单光子计数技术，深入开展量子点/微腔复合体系光场耦合效应、光谱动力学特性及微腔调制量子点激射效应研究，解析微腔品质、结构、量子点种类、复合浓度等对复合体系光学性能的影响，给出温度依赖的腔模与激子能量从非共振到共振的转变及微腔调制的量子点可调谐激射，结合理论模拟，阐明复合体系所诱发的各种新奇物理现象的本质，实现宽波谱、多波长、可调谐的光场有效连续低维调控。

For the application of advanced optical functional materials, the design, preparation, optical modulation and optical manipulation of the radiation source/microcavity composite system are attracting tremendous attentions in the field of optical microcavity, which is important for the development and application of novel cavity-based optoelectronic devices in the future. In this project, high quality quantum dots/microcavity will be fabricated using the sol-gel synthesis and advanced femtosecond laser microfabrication based on the excellent optical properties of the II-VI group colloidal quantum dots. We investigate the optical coupling effect, lasing and kinetic spectroscopic properties by using the multi-dimensional resolved spectroscopic technique and the time-correlated single photon counting technique. Analysis of the influence of the quality, structure, quantum dot type, compound concentration on the optical properties of composite system. We can control precisely the energy detuning between excitons of the quantum dots and the cavity modes, and observe the crossing behavior at the energy resonance region by tuning the temperature. Tunable lasing in a wide spectral range from the quantum dots in the microcavity will be realized. Combined with the theoretical analyses, we will clarify the physical nature of the novel phenomena induced by the composite microcavity and realize the low-dimensional, continuous, effective optical control in a wide range.