Abstract

Mid-infrared (MIR) and Terahertz (THz) spectral region, hereafter defined as the ~3 – 300 μm wavelength range, hosts particular scientific and technological interests. Many molecules have strong and rich spectral fingerprints in this MIR region, therefore, MIR photonic and optoelectronic devices are potentially very promising for a breath of applications such as environmental and biochemical sensing, defense and security, industrial control, and medicine, etc. Since the discovery of graphene in 2004, two-dimensional (2D) materials have attracted tremendous research interests due to their unique and intriguing electrical and optical properties. In this talk, I am going to present our research in applying 2D materials for applications in the MIR and THz regime. In particular, I will show our recent demonstrations of a room temperature broadband PtSe_x-based photodetector [1], a high responsivity hybrid MIR photodetector based on graphene integrated with broadband oxide based nanoparticles [2], and a novel THz detector based on semimetals [3].

© 2019 The Author(s)