Nanowerk August 10, 2020
The interactions between the different layers in structures, held together by van der Waals forces, can give rise to entirely new properties. An international team of researchers (Switzerland, France, Japan) has succeeded in creating such a structure using double layer of molybdenum disulfide sandwiched between an insulator and the electrical conductor graphene on each side. If a voltage is applied to the outer graphene layers it generates an electric field that affects the absorption properties of the two molybdenum disulfide layers. By adjusting the voltage applied wavelengths at which the electron-hole pairs are formed in these layers can be selected. The research could pave the way for a new approach to developing optoelectronic devices such as modulators…read more. Open Access TECHNICAL ARTICLE
Schematic illustration of the electron-hole pairs (electron: pink, hole: blue), which are formed by absorption of light in the two-layer molybdenum disulfide layer. Credit: Nadine Leisgang and Lorenzo Ceccarelli, Department of Physics, University of Basel