Emerging semiconductor nanoscale devices and systems for classical and quantum information processing

Emerging semiconductors, ranging from atomic layer semiconducting crystals (such as transition metal dichalcogenides (TMDCs) and black phosphorus) to wide and ultrawide bandgap materials (such as SiC and Ga₂O₃), along with their heterostructures, offer compelling new platforms for electronic, photonic devices and transducers, where the unconventional and unique properties of these crystals can be harnessed for engineering both classical and quantum signal processing and sensing schemes.  In this presentation, I will describe some of my research group’s latest endeavors and results on advancing solid-state device physics and engineering, by employing some of these emerging semiconductors.  In classical domain, we build atomically thin transistors, optoelectronic devices, and a new class of nanoscale transducers, 2D nanoelectromechanical systems (NEMS), all enabled by 2D semiconductors and their van der Waals heterostructures.  We demonstrate how the unconventional properties of these structures and their internal strong coupling effects have led to novel transistors and logic circuits, optoelectronic devices, and resonant NEMS transducers with remarkably broad dynamic range and electrical tunability, as well as new phenomena and device functions.  Toward quantum engineering, atomistic defects in SiC and emerging 2D crystals support single-photon quantum emitters promising for enabling quantum bits (qubits) at room temperature.  Built on our recent attainments in SiC photonics and 2D devices, we explore such platforms and heterogeneous integration, toward realizing quantum transduction and information processing in chip-scale integrated systems.

Host: Yoonseok Lee