Ultra-thin Gate Oxide Process Technology，Wafer Stress Analysis Technology using MOS Devices，High-k Dielectric Process Technology，Novel On-chip Silicon MOS Temperature Sensor

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

GeSi/Si、SiGeSn Molecular Beam Epitaxy，optical and electrical properties of semiconductor Heterostructure，novel SiGe semiconductor nanodevices

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. Advanced memory technology: FeRAM, FeFET, and FTJ/MTJ 2. Quantum computing: quantum dots, single electron transistors, Coulomb blockade, microwave spin manipulation, cryo-CMOS 3. Superconductors: Josephson junctions, superconductor/semiconductor heterojunctions, superconducting FETs, transmon qubits 4. Spintronics: spin-orbit coupling, spin injection, spin FETs 5. 2D transition metal dichalcogenides spintronics and device applications 6. Si photonics: GeSn photodetectors, GeSn LEDs

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

(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.

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