Date & Time: 

   2024 / 3 / 22 (Fri) 14:20 - 16:20

 

Location: 

   Delta Building R216, NTHU

 

Speaker: 

   楊尚樺 教授

   國立清華大學 電子所

 

Topic: 

   Now you see - THz devices, sensing and imaging

 

Abstract: 

   Terahertz (THz) imaging technology is growing rapidly due to its variety of potential applications in security screening, biotech pharmacy, industrial inspection as well as material characterization. However, the practical feasibility of THz imaging systems is significantly limited by the low efficiency of active THz devices, long imaging acquisition time and insufficient use of THz signal datasets. To address on these limitations, we propose a high-precision, time-resolved terahertz tomography system based on plasmonic THz photoconductive antennas to offer significantly higher SNR compared to conventional THz imaging setups. Furthermore, we present an algorithm, terahertz differential pulse delay computed tomography, utilizing temporal and spatial correlation of measured THz signals for time-resolved terahertz tomographic imaging which greatly enhances image quality of the measured objects. This paves the way toward real-time, hyperspectral terahertz 3D imagers in near future, which opens the door for varies of exciting applications in non-destructive sensing, imaging and material inspection.

 

Autobiography: 

   Dr. Shang-Hua Yang is an Associate Professor in the Department of Electrical Engineering at National Tsing Hua University. He received his B.S. degree in Electrical Engineering from National Tsing Hua University, Taiwan, in 2007, M.S. degree in Electro-Optical Engineering from National Chiao Tung University, Taiwan, in 2009, and Ph.D. degree in Electrical Engineering from the University of Michigan Ann Arbor in 2016. Dr. Yang has established significant contributions to the development of terahertz (THz) optoelectronics, THz communication, THz imaging, integrated THz systems, and innovative plasmonic photonics applications. The outcomes of his research have appeared in over 100 refereed papers in peer-reviewed journals and conference proceedings on these topics. He was the director of NTHU Garage Incubator (2018-2020), deputy executive director of NTHU Zai Wu College (2018-2020), and has served in several IEEE/SPIE conference technical program committee boards since 2020. Dr. Yang is currently the Director of NTHU THz Optics & Photonics Center.