Research Interests

| Light Control for Understanding Nature |

The use of light, spanning from Ultra-violet (UV) and Visible light to Infrared (IR), Terahertz (THz), and Microwave frequencies can interact with various materials. The optical system is designed to create localized fields and induce material responses, such as the excitation of carriers or molecules, enabling detailed observation and analysis of material dynamics. The Terahertz range is specifically highlighted for its potential in these studies as below.

• Enabling microscopy in a noninvasive and noncontact manner.

• Facilitating the understanding of molecular behaviors.

• Providing crucial fundamentals for material science research.

| Metamaterial Design |

Tunable and Robust Measurement Condition

Metamaterials are specifically designed to strongly localize and enhance the electromagnetic field at the surface. Various types of unit geometry and hybridization of materials enable the tuning of the resonance frequency and functionalities in sensing performance. By maximizing this localized E-field, the sensitivity of the platform is drastically improved, allowing it to detect small perturbations caused by biological or chemical molecules within the metasurface's mode volume.

| Nanoscopy |

Molecular LEVEL:
The sensing platform ensures significantly enhanced sensitivity and specificity by recognizing the intermolecular changes associated with target molecule binding and aqueous surrounding effects.

Thin Film LEVEL:
Terahertz nanoscopy overcomes the diffraction limit to provide high-resolution imaging of metallic and semiconductor thin films at the nanoscale. This technique enables the non-destructive characterization of local carrier dynamics and electrical conductivity variations within the thin layers.