Valley-addressable polaritons in atomically thin semiconductors

Researchers excite valley-addressable polaritons in MoSe2 incorporated in a photonic microcavity. Understanding of the valley pseudospin retention is revealed and robust states demonstrated. The locking of the electron spin to the valley degree of freedom in transition metal dichalcogenide (TMD) monolayers has seen these materials emerge as a promising platform in valleytronics1,2. When embedded in optical microcavities, the large oscillator...