Abstract
Two-dimensional (2D) transition metal dichalcogenide (TMDC) materials have the potential to open up a new age of atomic-scale photonics. However, much fundamental of the light-matter interaction of these materials has generally remained to be elusive. The optical response of the materials is very weak due to the atomically thin dimension, which stands as a huge challenge for the device development. Here we present our recent results on the light-matter interaction of 2D TMDC. We have demonstrated that excitonic effects dominate the light-matter interaction of the TMDC materials with layer number less than 5–7. The light absorption of atomically thin TMDC materials ( 75% for narrowband or broadband incidence like solar radiation. Additionally, we have demonstrated that the light-matter interaction of 2D TMDC materials can be substantially tuned in electrical ways.
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