Using laser to trigger an atomic shift in 2D layered crystal Janus semiconductors, actively controlling light-flow through the material

https://www.eurekalert.org/news-releases/1104606

"Janus transition metal dichalcogenides, such as molybdenum sulfur selenide/ molybdenum disulfide... Janus means top/ bottom atomic layers different chemical species, giving material internal electrical polarity/ high external force/ light sensitivity, which together with strong coupling between layers causes atoms' displacement... optical switches/ components for photonic chips: less heat/ greater efficiency, than electrical... displays, imaging, quantum light sources, detectors sensing smallest vibrations/ pressure changes"