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一、超快光子门技术及其应用
发展超高速喷雾流场光学成像技术，对发动机的设计具有重要意义。在火箭等发动机超高速燃料喷雾的近场区，由于射流湍流强度大、液滴密度高，通常的流场观测技术无法适用。针对超高速燃料喷雾流场光学成像技术目前存在的若干问题，发展了适用于近场区燃料喷雾成像观测的飞秒超快光子门选通弹道光技术。系统开展了新型超快光克尔介质特性及应用、超快光克尔门空间选通特性与泵浦光强依赖关系、光克尔门中多种非线性效应竞争机制及调控方法、飞秒脉冲在散射介质中传播特性等超快光克尔门选通弹道光成像基础理论的研究，提出并发展了飞秒外差光克尔门选通成像、差分光克尔门选通成像、长工作距离显微成像和超连续谱直接照明成像等提升超快光克尔门选通弹道光成像信噪比和分辨率等性能的新方法和新技术。
代表性工作：
1. M. Wang, W. Tan*, J. Si, Y. Zheng, Z Huang, Diagnosis of liquid-gas mixed sprays in the near-field region using femtosecond laser induced supercontinuum imaging method, Opt. Express 28(3), 3298-3304 (2020).
2. M. Wang, J. Si*, W. Tan, Y. Zheng and Y. Yang, “Comparison of femtosecond shadowgraphy and optical Kerr gated ballistic imaging for measurements of spray structures,” Opt. Express 27(11), 16080-16087 (2019).
3. Z. Zhao, W. Tan*, Y. Zheng, M. Wang and X. Liu, “Long-working-distance microscopic imaging through a scattering medium using supercontinuum illumination,” Phys. Scr. 94, 045505 (2019).
4. Y. Zheng, W. Tan*, X. Liu, and J. Tong “Ballistic imaging through an intense scattering medium using a supercontinuum with a roundabout spatial gate”, Opt. Express, 25(17), 20431-20436 (2017).
5. W. Tan, P. Zhan, J. Si, S. Xu, J. Tong, H. Xu, and X. Hou, "Sharpness-enhanced ultrafast imaging by using a biased optical Kerr gate," Opt. Express, 22, 28100-28108 (2014).
二、超快光谱技术及其应用
针对目前超快荧光光谱测量系统，大都缺乏微区检测能力，开发了具有微区检测能力的飞秒光克尔选通超快荧光光谱宽场显微成像测量系统和和飞秒荧光上转化荧光显微测量系统，提出了一种飞秒双脉冲开关超快光克尔门方法，解决了普通光克尔门难以兼具高透过率和快开关时间的难题；提出了一种级联飞秒光克尔门选通荧光测量新方法，解决了普通飞秒光克尔门测量荧光中荧光背底导致信噪比下降的问题。进一步基于课题组开发的微区飞秒时间分辨瞬态吸收光谱测量和上述超快荧光光谱测量系统，开展了磷化铟量子点、碳纳米点、钙钛矿纳米晶等低维材料中动力学有关研究，特别关注微纳激光及其动力学过程研究。
代表性工作：
1. C.Yang, L. Hu, W. Tan*, J. Si, and X. Hou, Engineering Solid-State Fluorescent Carbon Dots with Aggregation-Induced Emission by Fatty Amine Chains-Regulated Charge Transfer and π-π Stacking, Advance Optical Materials, 13(7), 2402638 (2025).
2. C.Yang, Y. Liu, W. Tan*, J. Si, and X. Hou. Effect of Carrier Dynamics on Mode Shift in the Ultrafast Timescale of Perovskite Microlasers. Journal of Chemical Physics 162(19), 194705 (2025)
3. C. Yang, Y. Liu, W. Tan*, J. Si, and X. Hou. Tailoring Ultrafast Energy Funneling and Hot Carrier Cooling in Quasi-2D Perovskites toward Low-Threshold Lasing. Laser Photonics Review 20(2) e01516 (2025)
4. J. Hu, W. Tan*, C. Wang, L. Yan, J. Si, and X. Hou; One-step microwave synthesis of high-efficiency solid-state luminescent carbon dots with aggregation-induced emission, Optical Materials 150:115219 (2024).
5. S. Zeng, W. Tan*, J. Si, L. Mao, J. Shi, Y. Li, and X. Hou, Ultrafast Electron Transfer in InP/ZnSe/ZnS Quantum Dots for Photocatalytic Hydrogen Evolution, Journal of Physical Chemistry Letters, 13(39), 9096-9102 (2022).
三、光场调控技术及其在非线性光学和散射成像领域的应用
反馈迭代波前整形是一种闭环光场调控技术。该技术以目标光场指标为反馈，通过迭代优化算法驱动空间光调制器等波前整形设备预补偿波前畸变，使散射 / 传输后的光场收敛到预设形态（聚焦、成丝、光斑整形）。利用该技术，开展了主动调控飞秒激光成丝想象中成丝起点、长度和稳定性的研究工作，也初步探索了该技术在散射体后激光聚焦与成像中的应用。
代表性工作：
1. J. Li, W. Tan,* J. Si, S. Tang, Z. Kang, and X. Hou. Control of the spatial characteristics of femtosecond laser filamentation in glass via feedback-based wavefront shaping with an annular phase mask [J]. Optics Express, 29(4): 5972-5981 (2021).
2. J. Li, W. Tan,* J. Si, S. Y. Tang, Z. Kang, and X. Hou. Control of femtosecond single-filament formation via feedback-based wavefront shaping [J]. Optics Communications, 490: 126929 (2021).
3. J. Li, W. Tan,* J. Si, Z. Kang, and X. Hou. Generation of ultrabroad and intense supercontinuum in mixed multiple thin plates [J]. Photonics, 8: 311 (2021).
4. J. Li, W. Tan,* J. Si, S. Tang, Y. Yang, and X. Hou. Depolarization of the supercontinuum induced by linearly and circularly polarized femtosecond laser pulses in water [J]. Physical Review A, 104, 053535 (2021)
5. S. Tang, W. Tan,* J. Si, J. Li, Y. Yang, and X. Hou. Feedback-based wavefront shaping based on light intensity distribution for focusing light through scattering media [J]. Journal of Applied Physics, 130: 033103 (2021).
