초고속 나노광소자 연구실

Our research group investigates optical and electronic phenomena in low-dimensional nanoscale materials using ultrafast imaging and laser spectroscopy. We focus in particular on van der Waals (vdW) layered materials, whose atomically thin layers enable precise control of atomic structure, flexible heterostructure design, and moiré engineering. The materials include graphene, transition metal dichalcogenides, hexagonal boron nitride, black phosphorus, and their heterostructures. These unique characteristics provide an ideal platform for exploring strong Coulomb interactions, emergent quantum phenomena, and novel light–matter interactions beyond the limits of conventional semiconductors. Ultrafast laser imaging and spectroscopy, together with the development of advanced device fabrication and material synthesis techniques, form the core experimental approaches of our research. Van der Waals quantum materials offer unprecedented control over layered structures with atomically thin and sharply defined interfaces. By engineering vdW stacking sequences and twist angles, it is possible to confine electrons within tunable atomic-scale and periodic potentials that do not exist in naturally occurring crystals. This level of structural control fundamentally reshapes light–matter interactions, enabling the enhancement and manipulation of optical processes such as light absorption, scattering, and emission. Our research seeks to uncover how these engineered electronic states interact with light at ultrafast time scales and to establish design principles for controlling optical responses in vdW quantum materials. Novel light emission and absorption properties of vdW quantum materials opens new opportunities for transformative optoelectronic devices that go beyond the foundations of c