UM6P School of Applied and Engineering Physics Researchers Develop Breakthrough in Ultrasensitive Quantum Dot Devices for Multipixel Applications

January 23, 2025

A team of researchers from the UM6P School of Applied and Engineering Physics, in collaboration with Petr Neugebauer’s group at the Central European Institute of Technology (CEITEC) at Brno University of Technology, and Dr. Kurt Gaskill’s group at the U.S. Naval Research Laboratory (NRL) and the University of Maryland, has made a groundbreaking advance in quantum dot technology. Their research, titled “Quantum Dots Array: An Approach to Multipixel Devices“, introduces a new class of graphene quantum dot (GQD) devices on Si02 that can be arranged in multi-parallel arrays, offering exciting possibilities for multipixel applications.

The team has developed a method to precisely tune both the total device area and impedance while maintaining superior performance. These GQD devices, with dots only 200 nm in diameter, were fabricated on CVD graphene on silicon oxide substrates and thoroughly analyzed for their transport properties. By arranging the dots in parallel, the researchers showed that could control the activation energy based on the back gate bias and the number of dots used, while still maintaining a high temperature dependence of resistance.

This breakthrough sets the stage for optimizing chip-scale arrays of GQD-based devices, paving the way for advanced applications in imaging systems, magneto-optical spectroscopy, quantum sensing, and more. The findings have the potential to significantly enhance the performance of devices in fields ranging from quantum technologies to environmental monitoring.

The full study is now available in Journal of Physics D: Applied Physics and can be accessed via DOI: 10.1088/1361-6463/adacf8.