Svenja Mauthe, Heinz Schmid, et al.
DRC 2018
We report an experimental study on quasi-one-dimensional Al-Ge-Al nanowire (NW) heterostructures featuring unmatched photoconductive gains exceeding 107 and responsivities as high as 10 A/μW in the visible wavelength regime. Our observations are attributed to the presence of GeOx related hole-trapping states at the NW surface and can be described by a photogating effect in accordance with previous studies on low-dimensional nanostructures. Utilizing an ultrascaled photodetector device operating in the quantum ballistic transport regime at room temperature we demonstrate for the first time that individual current channels can be addressed directly by laser irradiation. The resulting quantization of the photocurrent represents the ultimate limit of photodetectors, allowing for advanced concepts including highly resolved imaging, light effect transistors and single photon detectors with practically zero off-state current.
Svenja Mauthe, Heinz Schmid, et al.
DRC 2018
Yannick Baumgartner, Daniele Caimi, et al.
GFP 2019
Preksha Tiwari, Svenja Mauthe, et al.
NUSOD 2020
Benedikt F. Mayer, Stephan Wirths, et al.
IEEE Photonics Technology Letters