Research of this project is divided in three major categories. Developing growth protocols for different types of bilayer TMD heterostructure in the multistep CVD growth, growing large area monolayers and manipulating them mechanically into vertical heterostructures is delivered through first category “Heterostructure synthesis”. Subsequent phase of the research is “Characterization of heterostructures and device fabrication” which goal is to pre-select prepared heterostructures suitable for detailed optical response experiments. Preparing contacted devices of individual heterostructures, which will extend possibilities to control the optical response and measuring electronic bands of individual heterostructures on micro-scale. In order to investigate optical properties of aforementioned materials we need to develop new, advanced optical setup based on confocal microscope dedicated for the absorption, photoluminescence and Raman spectroscopy measurements in 2D materials. In the category “Optical response” the goal is to systematically establish a relationship between optical the response and heterostructure composition and stacking alignment. Addressing the influence of the layer interface in terms of preparation method and subsequent chemical modification, e.g. water intercalation. Investigating influence of electrostatic gating and nano-scale defects on optical response of TMD hererostructures.
Characterization of heterostructures and device fabrication
Photoluminescence and Raman mapping