Dr. Long Ju
Advisor: Professor Feng Wang, Department of Physics
My thesis describes the use of optical spectroscopy in studying the physical properties of two dimensional nano materials like graphene and hexogonal boron nitride. Compared to bulk materials, atomically thin two dimensional materials are unique in that both electronic band structure and chemical potential can be tuned in situ by electric field. Therefore optical studies in such systems greatly benefit from modern micro-facbrication technique and electric control of the material properties. This thesis demonstrated a few examples of new possibilities in material science by combining opticap spectroscopy with other experimental techniques, such as electric transport and STM measurements. These experiments are driven by important problems in 2D materials but are generally beyond the reach of each individual technique.