Technical University of Denmark

Abstract：

The terahertz (THz) spectral region reveals rich light-matter interactions fundamental to modern materials science. THz time-domain spectroscopy (THz-TDS) has become a key tool for investigating these dynamics. Among the various ultrafast THz platforms, femtosecond (fs) laser-induced two-color air-plasma generation stands out for delivering ultrashort pulses (tens of fs) with a continuous, gapless spectrum covering the entire THz range (1–30 THz).

In this talk, I will present our recent progress in developing and applying ultra-broadband THz technology. We will begin with an overview of this THz platform and its current state-of-the-art. I will then highlight breakthroughs in coherent detection techniques, including balanced biased detection, scanning-free waveform acquisition, and single-shot detection of ultrabroadband THz pulses, demonstrated at the SECUF beamlines. Finally, I will showcase selected applications in ultrafast spectroscopy, including the observation and theoretical modeling of intense, non-thermal nonlinear terahertz (THz) responses in graphene, as well as the time-resolved characterization of tin-based perovskite light-emitting diodes (LEDs). These developments underscore the unique potential of THz air photonics for exploring ultrafast phenomena in emerging materials and optoelectronic devices.

Brief CV of Prof. Binbin Zhou：

Binbin Zhou is an Associate Professor at the Technical University of Denmark (DTU), where he leads a research team specializing in ultrafast THz air photonics. He received his Ph.D. in Optical Physics from the Institute of Physics, Chinese Academy of Sciences, in 2009, with a focus on femtosecond laser technologies. Since moving to Denmark in 2009, he has advanced through the roles of postdoctoral Researcher, Researcher, and Senior Researcher, and was appointed Associate Professor at DTU in 2021.

His research focuses on ultrafast terahertz spectroscopy, with emphasis on developing ultra-broadband THz generation and detection techniques, and applying them to study emerging material systems, such as low-dimensional semiconductors, quantum materials, and strongly correlated systems. He has authored over 60 peer-reviewed publications in leading journals, including Physical Review Letters, Nature Photonics, Optica, and Advanced Materials. His research has been supported by the Independent Research Fund Denmark, as well as other major Danish funding agencies, including the Novo Nordisk Foundation and the Villum Foundation.

报告地点：M楼238会议室

腾讯会议ID：613-707-853

会议密码：0711

主持人：李玉同 研究员

联系人：傅琦 （82649469）