Creating and Probing Electron Whispering Gallery Modes in Graphene

Understand

Designing high-finesse resonant cavities for electronic waves faces challenges due to short electron coherence lengths in solids.

• Previous approaches, e.g.
• the seminal nanometer-sized quantum corrals, depend on careful positioning of adatoms at clean surfaces.
• Here we demonstrate an entirely different approach, inspired by the peculiar acoustic phenomena in whispering galleries.