Topic：Mid-infrared and Terahertz Photonics: 2D-material Detectors and Topological Lasers

Speaker：Prof. WANG Qijie, Nanyang Technological University (NTU), Singapore

Time: Saturday, June 15, 2024, 10:00 a.m.

Venue: B707, New Main Building, Xueyuan Road Campus

Abstract:

Mid-infrared (MIR) and Terahertz (THz) spectral regions, hereafter defined as the ~3 – 300 μm wavelength range, host particular scientific and technological interests. Many molecules have strong and rich spectral fingerprints in this MIR region, therefore, MIR photonic and nanophotonic devices are potentially very promising for a breath of applications such as environmental and bio-chemical sensing, industrial control, and medicine, etc. THz region has wide applications in free space communication, imaging and spectroscopy. However, MIR and THz regions remain a far from mature region, with a dearth in both passive and active components. This talk will cover the recent developments in the speaker’s research group on MIR photodetectors based on 2D materials and nanoparticles with high performance and multifunctionalities, and electrically pumped THz topological quantum cascade laser with topological robustness, polarization control, and compact footprint.

About the Speaker:

WANG Qijie is a Professor at the School of Electrical and Electronic Engineering (EEE) and the School of Physical and Mathematical Sciences (SPMS) of Nanyang Technological University (NTU). He is the Associate Chair (Research) of School of EEE NTU, Singapore. He is an OPTICA Fellow. He is a co-recipient of the Institution of Engineers Singapore, Prestigious Engineering Achievement Team Award of Singapore Twice in 2005 and 2017, respectively, and the recipient of the prestigious Singapore Young Scientist Award 2014, Nanyang Research Award 2015 (Young Investigator), ARC Sciences Nanotechnology Medal and Prize 2021, and NTU College of Engineering Research Excellence Award 2022.

School of Instrumentation and Optoelectronic Engineering