Van de Waals (vdW) heterostructures – which consist of precisely assembled atomically thin electronic materials - exhibit unusual quantum behavior. These quantum materials-by-design are of fundamental interest in basic scientific research and hold tremendous potential in advanced technological applications. Problematically, the fundamental optoelectronic response in these heterostructures is difficult to access using the standard techniques within the traditions of materials science and condensed matter physics. In the standard approach, characterization is based on the measurement of a small amount of one-dimensional data, which is used to gain a precise picture of the material properties of the sample. However, these techniques are fundamentally lacking in describing the complex interdependency of experimental degrees of freedom in vdW heterostructures. In this talk, I will present our recent experiments that utilize a highly data-intensive approach to gain deep understanding of the infrared photoresponse in vdW heterostructure photodetectors. These measurements, which combine state-of-the-art data analytics and measurement design with fundamentally new device structures and experimental parameters, give a clear picture of electron-hole pair interactions at ultrafast time scales.
Nathaniel M. Gabor, "Three-particle annihilation in a 2D heterostructure revealed through data-hypercubic photoresponse microscopy (Conference Presentation)," Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101940G (Presented at SPIE Defense + Security: April 09, 2017; Published: 12 June 2017); https://doi.org/10.1117/12.2262610.5459357392001.
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