Controlling Thermal Radiation in Both Near- and Far-Field Regimes with 2D Materials
Controlling Thermal Radiation in Both Near- and Far-Field Regimes with 2D Materials
Zhuomin Zhang, Professor
George W. Woodruff School of Mechanical Engineering
Georgia Institute of Technology, Atlanta, GA 30332
报告地点：紫金港东五楼浙大光及电磁波研究中心二楼会议室
报告时间：2018年5月16日下午2点-4点
The study of micro/nanoscale thermal radiation has attracted great attention due to the promising applications in advanced energy harvesting, nanomanufacturing, thermal control and management, and high-resolution thermal mapping. Micro/nanoscale thermal radiation concerns both near-field radiative heat transfer between closely spaced objects and the interaction of electromagnetic waves with micro/nanostructured materials that could potentially modify the far-field radiative properties. Recent advances in graphene and other two-dimensional (2D) materials offer enormous potential to transform current microelectronic, optoelectronic, photonic devices, as well as energy systems. As a layered 2D material with carbon atoms arranged in a honeycomb lattice, graphene has unique electronic, thermal, mechanical, and optical properties. Exotic radiative properties and near-field enhancement can be enabled by graphene-covered micro/nanostructures, including perfect absorption, blocking assisted transmission, and enhanced near-field radiative transfer. As a natural hyperbolic material, hexagonal boron nitride (hBN) can support multiple orders of phonon-polariton waveguide modes in its two infrared Reststrahlen bands. We have theoretically demonstrated that hybrid graphene-hBN-film heterostructures can significantly augment photon tunneling. Furthermore, hBN-covered metal-gratings and gratings made of hBN exhibit unique radiative properties for the spectral and directional control of thermal radiation. These theoretical works will be presented in this talk, along with a discussion on the design and progress in the experiments to be performed in order to realize the potential of using 2D materials for controlling thermal radiation in both the near- and far-field regimes.
Biographic Sketch: Professor Zhuomin Zhang earned a Ph.D. degree from MIT and worked at NIST and University of Florida prior to joining Georgia Tech. He received his B.S. and M.S. degrees from the University of Science and Technology of China (Hefei). Professor Zhang is a Fellow of ASME, AAAS, and APS, and an Associate Fellow of AIAA. Professor Zhang’s research interests are in micro/nanoscale heat transfer especially nanoscale thermal radiation for energy conversion and temperature measurement. He has written a book on Nano/Microscale Heat Transfer(McGraw-Hill, 2017), co-authored over 180 journal papers, and given over 370 invited and contributed presentations. A number of his former students have established independent careers at major universities or industry in the United States, China (mainland and Taiwan) and South Korea. In addition, Professor Zhang has supervised many visiting scholars, postdoctoral fellows and undergraduate student researchers. He currently serves as an associate editor of the Journal of Heat Transfer and the Journal of Quantitative Spectroscopy & Radiative Transfer. He served as the Program Chair of the ASME 3rd Micro/Nanoscale Heat & Mass Transfer International Conference (Atlanta, March 2012), Chair of the 2nd International Workshop on Nano-Micro Thermal Radiation (Shanghai, June 2014), and General Chair for the ASME 5th Micro/Nanoscale Heat & Mass Transfer International Conference (Singapore, January 2016). Professor Zhang was a recipient of the 1999 Presidential Early Career Award for Scientists and Engineers (PECASE) and the 2015 ASME Heat Transfer Memorial Award, among others.
