讲座题目：Thermal radiation: innovations and opportunities

时间：2024年5月27日（周一）下午15:00-17:00

地点：理学楼A301

报告人：肖宇哲（Yuzhe Xiao）助理教授（Assistant Professor）

报告人简介：

肖宇哲博士是美国北德克萨斯大学物理系助理教授。2008年毕业于哈尔滨工业大学光信息专业，2014年毕业于罗切斯特大学光学研究所（美国三大光学中心之一）并获得博士学位，随后在加州大学圣地亚哥分校和威斯康星大学麦迪逊分校从事博士后研究，2023年入职美国北德克萨斯大学物理系。他的主要研究兴趣在红外热辐射、非线性光学、量子等离子体学和量子光学材料等领域，近年来在Nature Materials, Nature Photonics, Nature Communications, Light: Science and Applications, Laser & Photonics Review等国际期刊发表论文50余篇。肖宇哲博士是DARPA青年教师奖(2023年)、WARE创新奖入围者(2021年威斯康星大学麦迪逊分校)和Agnes M. and George Messersmith奖学金(2013年罗切斯特大学)的获得者。

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讲座内容：

Everyhot object emits electromagnetic radiation, which is called thermal radiation or thermal emission. Thermal radiation is a ubiquitous phenomenon, with examples including the light emittingfrom the sun or from an incandescent lightbulb. Even though thermal radiation has been well-known from the century-old Planck’s law, recent applications of thermal radiation in energy harvesting, radiative cooling, and sensing have led to a renewed research interest of this topic.

Thistalk aims to focus on three aspects of thermal radiation. First, I will talk about our effort to achieve precision measurement of thermal radiation. Based on this measurement capability, I will introduce depth thermography, a new metrology method that can measure the temperature distribution of an object as a function of depth. Further, I will talk about Planck spectroscopy, a spectroscopic technique that does not require wavelength-selective components such as prisms, gratings, or interferometers—instead using the temperature dependence of Planck’s law of thermal radiation. The last part of my talk will cover the manipulation of thermal radiation, where I will show nano-second modulation of thermal radiation via modulated emissivity, with a speed much faster than the thermal time constant of the emitter. This talk will conclude with an introduction of research topics in my group at UNT.

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理学院

2024年5月20日