5 papers
Stress-strain in electron-beam activated polymeric micro-actuators
Davide Giambastiani, Fabio Dispinzeri, Francesco Colangelo +5
Actuation of thin polymeric films via electron irradiation is a promising avenue to realize devices based on strain engineered two dimensional (2D) materials. Complex strain profil…
Local tuning of WS2 photoluminescence using polymeric micro-actuators in a monolithic van der Waals heterostructure
Francesco Colangelo, Andrea Morandi, Stiven Forti +8
The control of the local strain profile in 2D materials offers an invaluable tool for tailoring the electronic and photonic properties of solid-state devices. In this paper, we dem…
Local anodic oxidation on hydrogen-intercalated graphene layers: oxide composition analysis and role of the silicon carbide substrate
Francesco Colangelo, Vincenzo Piazza, Camilla Coletti +3
We investigate nanoscale local anodic oxidation (LAO) on hydrogen-intercalated graphene grown by controlled sublimation of silicon carbide (SiC). Scanning probe microscopy (SPM) wa…
Anisotropic straining of graphene using micropatterned SiN membranes
Fabiana Francesca Settembrini, Francesco Colangelo, Alessandro Pitanti +7
We use micro-Raman spectroscopy to study strain profiles in graphene monolayers suspended over SiN membranes micropatterned with holes of non-circular geometry. We show that a unif…
Thermal noise and optomechanical features in the emission of a membrane-coupled compound cavity laser diode
Lorenzo Baldacci, Alessandro Pitanti, Luca Masini +4
We demonstrate the use of a compound optical cavity as linear displacement detector, by measuring the thermal motion of a silicon nitride suspended membrane acting as the external…