Compound Semiconductor Materials and Devices，Molecular Beam Epitaxy

Semiconductor Lasers，Broadband Semiconductor Optical Amplifiers，Nano-optoelectronics，Light Emission Based on Si

SiGe/GeSn epi/photonics, stacked 3D transistors, thermal simulation (physics-based and neural network-based), IGZO TFT, and solar cells

Organic Optoelectronic Semiconductors and Devices，Display technologies,lighting technologies，Nano science and technologies，Soft (flexible) electronics

Semiconductor nanostructures，Organic semiconductors，Semiconductor physics，Surfaces and interfaces of semiconductors，Nitride-based semiconductor devices

Growth and Device Applications of Graphene, Growth and Optical- and Electrical- Device Applications

Bio/MEMS hybrid technology, Nano-Micro fabrication technology and application, and Nanobiotechnology

Advanced ALD Technology，Nanoscale Transistors，Nanoplasmonics and Surface Enhanced Raman Scattering (SERS)，ALD-assisted Photonics

Compound semiconductor microelectronic and optoelectronic devices, light-emitting transistors and transistor lasers, vertical-cavity surface-emitting lasers, DFB lasers, 2D material devices, optoelectronic integrated circuits, high frequency and high power GaN HEMTs.

1. Ge nanosheet FETs and direct-band gap GeSn transistors 2. Cryo-CMOS IC design: mixer, amplifier, DA/AD converters, and FPGA control for qubits. 3. Quantum computing devices: semiconductor quantum dots, superconducting Josephson junctions, superconductor/semiconductor heterojunctions, and superconducting FETs. 4. Si photonics: GeSn modulators and photodetectors 5. Spintronics: spin-orbit coupling, spin injection, spin FETs

(1) Ferroelectric FET, memory and circuits for ultra-low power and neuromorphic applications. (2) Silicon, Ge, III-V, and 2D materials based nano-electronics. (3) Low power and high performance SRAM design. (4) Monolithic 3D IC and system-technology co-optimization.

Negative Capacitance (NC), Ferroelectric Memory/Synapse, GaN-based Devices & Polarization Applications, Device Fabrication and Electrical Analysis

ultrahigh speed/power photodiodes and avalanche photodiodes, high-speed vertical-cavity surface-emitting laser and photodiode for optical interconnect, light source and detector for FMCW LiDAR.

My major research areas cover from flexible electronics, heterogeneous electronics, and novel nano-fabrications techniques. In the flexible electronics, I focus on exploiting the applications of the flexible thin-film nanomembranes in its high-speed, high-power, opto, and medical applications. The uniqueness of the releasable single crystal nanomembranes can also achieve heterogeneous integration of different materials to boost the electronics performance that is not achievable through traditional epitaxial growth approaches. In the nanoelectronics, I will focus on the interaction of small molecular chemicals and its interaction with the semiconductor materials to achieve the sub-10nm fabrication proc