Single Photons, Spins and Dipoles in van der Waals Materials

摘要

Monolayer transition metal dichalcogenides (TMDs) and their heterostructures, such as WSe2/MoSe2 heterobilayers, are atomically thin semiconductors with a “valley” degree of freedom, which can be optically addressed, thus opening up exciting possibilities for quantum “valleytronics”. Recently, naturally occurring single quantum emitters, believed to be excitons trapped in shallow potentials, were reported in TMDs [1]. They seem to inherit the valley degree of freedom from the host TMD and owing to their longer lifetimes, appear promising for quantum information processing applications.