主讲人：肖宇哲，美国北德克萨斯大学
时 间：2024年5月10日10:00
地 点：物电学院A栋414
联系人：赵楚军
讲座摘要：Every hot object emits electromagnetic radiation, which is called thermal radiation or thermal emission. Thermal radiation is a ubiquitous phenomenon, with examples including the light emitting from 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.
This talk 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.
主讲人简介：Dr. Yuzhe Xiao is an assistant professor in the Department of Physics at the University of North Texas. He received his Ph.D. degree from the Institute of Optics at the University of Rochester and was then a postdoc fellow at the University of California-San Diego and the University of Wisconsin-Madison. He has authored about 50 publications in the fields of thermal radiation, nonlinear optics, and quantum plasmonics. Dr. Xiao is the recipient of DARPA Young Faculty Award (2023), WARE Innovation Award Finalist (2021, UW-Madison), and the Agnes M. and George Messersmith Fellowship (2013, University of Rochester).
