主讲人：陈铠
主讲时间：2023-03-22 10:00:00
主讲人简介：陈铠博士目前是维多利亚惠灵顿大学罗宾逊研究中心资深科学家, 同时是新西兰麦克德尔米德先进材料研究中心以及多德-沃尔光电子学及量子科技研究中心助理研究员。 陈铠博士的研究领域为先进光电材料以及尖端光谱技术。他在先进激光系统, 光学检测技术, 光学以及非线性光学有着丰富经验。其发明以及开发的光谱技术已经被应用于材料科学, 物理化学以及生物等领域。基于光谱技术的专长, 陈博士与包含剑桥大学, 牛津大学, 北京大学, 根特大学, 台湾清华大学等世界顶尖研究机构有着密切合作关系, 相关研究成果已发表在高引用期刊。自2022年起, 陈铠博士也担任新创公司Advemto创办人以及技术长以开发销售其专利光谱技术。
主讲内容：The spectral evolution of photoluminescence (PL) in ultrafast timescales provides a straightforward route to investigate photoexcitation processes. Various applications have been demonstrated many areas in chemistry, physics, biology, and material science. Accessing the crucial sub-picosecond timescale requires using nonlinear optical effects trigger by femtosecond laser pulses. However, the conventional nonlinear optical gating method, fluorescence up-conversion, suffers from narrow spectral bandwidth due to phase matching condition, while the broadband method, optical Kerr gating suffers from low sensitivity due to high background noise. From technical point of view, it still demands a high-performance ultrafast PL method to simultaneously satisfy the requirements of effectiveness, ultrafast time-resolution, high sensitivity, and broad spectral bandwidth. Here, we perform a novel ultrafast time-resolved PL spectroscopy system based on the transient grating (TG) PL spectroscopy technique and advanced femtosecond light sources. This combination enables us to achieve a high-performance ultrafast optical gate driven by high pulse energy, high repetition rate, and ultrashort laser pulses. This system can rapidly capture sub-picosecond emission dynamics from UV to near-infrared region. We will use case studies in optoelectronic materials as examples to highlight the capability and new applications of this advanced optical characterization technique for material sciences.
讲座地点：尊师楼114
主办部门：光学与电子信息学院
