Research Areas

Investigating quantum dynamics of many-body states in quantum materials by optical spectroscopy

Our research focuses on exploring the quantum dynamics of many-body states in quantum materials such as 2D materials, topological insulators, and strongly correlated electron systems using optical spectroscopy. Techniques like time-resolved photoluminescence and pump-probe spectroscopy enable us to probe fundamental interactions and emergent phenomena arising from electron-electron, electron-phonon, and spin interactions. We aim to map excitation spectra and relaxation pathways of quasiparticles under various external stimuli, providing insights into coherent and incoherent processes that govern many-body states. Additionally, we investigate how these dynamics impact macroscopic properties like conductivity, magnetism, and optical nonlinearity, crucial for designing materials and devices for quantum computing, communication, and sensing.

By leveraging optical spectroscopy, our research contributes to a deeper understanding and manipulation of quantum dynamics in many-body states, advancing both fundamental physics and quantum technology applications.

Exploring high magnetic field science in 2D quantum devices

We closely collaborate with the National High Magnetic Field Laboratory (NHMFL) at the Los Alamos National Laboratory (LANL) in the United States to pursue exciting high-field science and explore novel quantum phenomena in 2D quantum devices. The NHMFL at LANL is a world-renowned research institution dedicated to implementing and utilizing extremely high magnetic fields for basic science research. It possesses powerful magnets, including the world's strongest 100.75 Tesla multi-pulse magnet, among others with strengths of several tens of Teslas. Our group has the expertise to fabricate "optical fiber coupled 2D quantum devices" specialized for optical spectroscopy under extremely high magnetic fields, and we regularly visit the NHMFL to continue our international collaboration.

Developing new quantum devices & quantum sensing technologies based on 2D quantum materials

We’re developing new quantum devices and sensors based on magnetic proximity interactions (MPIs), which are crucial for advancing quantum devices and sensing technologies based on 2D quantum materials. MPIs enable precise control over spin properties in non-magnetic 2D quantum materials when placed near 2D magnets. This control is essential for developing spintronic devices, integrating multifunctional properties, and enhancing the sensitivity of quantum sensors. Additionally, MPIs facilitate the exploration of novel quantum phenomena and support the scalable fabrication of nanoscale devices. By leveraging these capabilities, MPIs open up new possibilities for the next generation of quantum technologies, driving progress in quantum light sources, quantum computing, communication, and sensing.

Studying optical properties of 2D quantum materials by spectroscopic ellipsometry

Spectroscopic ellipsometry (SE) is a powerful and non-destructive optical technique used to measure the thickness and optical properties (dielectric functions) of thin films and multilayer structures. We incorporate the SE technique to investigate the optical properties of 2D quantum materials, leveraging its non-destructive testing, high sensitivity, precision, broad spectral coverage, and advanced modeling capabilities. These features make SE a uniquely powerful technique for this application. It provides essential insights that are crucial for both fundamental research and the development of advanced applications in electronics, photonics, and quantum technologies.

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