Center for Integrated Nanostructure Physics

Light plays an essential role in our daily lives in situations ranging from seeing and distinguishing objects to developing technologies such as energy, telecommunications, and medicine. Manipulation of light and enhancement of light-matter interaction is thus important not only for fundamental studies on physics and material science but also for improving and miniaturizing optical devices as well as for enabling envisioned new devices.

YSF team at CINAP focuses on studying the electrical & optical properties of 2D materials including graphene and transition metal dichalcogenides (TMDCs), and by combining artificial 2D materials, so-called metasurfaces, developing novel 2D material-based metamaterials that manifest the potential to dynamically control optical properties in order to accelerate their practical applications. The study on the 2D materials-based metamaterials will point to a new research direction on light-matter interaction and light control in the deep subwavelength scale, which will have an important impact on the area of optics, telecommunication, and bio-sensing. The project covers not only the fundamental physics of 2D materials and metamaterials related interesting phenomena, but also a design of practical devices for real-world applications such as THz & IR waveguide, THz flat lens for endoscope, sensitive biosensors, active beam splitters, and active holograms.

▲ Research vision of YSF project "Graphene based metasurfaces"

Key publications

[1] Kim, T.-T. et al. Electrical access to critical coupling of circularly polarized waves in graphene chiral metamaterials. Science Advances 3, e1701377 (2017).

[2] Kim, T.-T. et al. Amplitude Modulation of Anomalously Refracted Terahertz Waves with Gated‐Graphene Metasurfaces. Advanced Optical Materials 6, 1700507 (2018).

[3] Kim, T.-T. et al. Electrically Tunable Slow Light Using Graphene Metamaterials. ACS Photonics 5, 1800–1807 (2018).

[4] Park, S. H. et al. Observation of an exceptional point in a non-Hermitian metasurface. Nanophotonics (2020).