Two-Dimensional Materials

Two-dimensional transition metal dichalcogenides (2D TMDs) are atomically thin semiconductors that are promising room temperature light sources for applications in photo-detectors, light-emitting diodes, lasers, and sensors. We study the 2D TMD molybdenum disulfide MoS2. Quasi-particles called excitons and trions can be generated in MoS2 via optical or electrical excitation. The spectral response from these quasi-particles can depend on many factors, including the properties of the substrate. We study the interaction of MoS2 with an optical cavity made from gallium nitride (GaN), which contains its own optical emitters, to study the behavior of light in this coupled system.


We study the optical and material properties of 2D semiconductors such as molybdenum disulfide (MoS2) with novel substrates. We additional study the fundamental interactions of these 2D materials with nano-scale optical cavities to modulate and enhance the 2D material light emission.


SEM of MoS2 flakes on array of GaN disks



Bare GaN disk