Researchers from the City College of New York have demonstrated how to manipulate the electron valley property in 2D semiconductors. This could be seen as a step towards the realization of valleytronics-based logic gates.
To control the valley, the researchers used a light trapping structure called a microcavity. The microcavity gives rise to half-light-half matter quasi-particles which have the fingerprint of the valley property. A laser can be used to optically control the quasi-particles in order to access the electrons occupying specific valley.