2025/09/02 by Giulia Meucci, Dāgs Olšteins, Meucci, Giulia +15
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Nanowire Synthesis and Applications #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.2509.02078
openalex publication_date 2025/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Indium-Arsenide (InAs) nanowire field-effect transistors (NWFETs) are promising platforms for high-speed, low-power nanoelectronics operating at cryogenic conditions, relevant for quantum information processing. We use selective area growth (SAG) of nanowires to realize scalable and planar nanowire device geometries that are compatible with standard semiconductor processing techniques. NWFETs are fabricated and their low temperature characteristics - including ION/IOFF ratios, threshold voltages, sub-threshold slope, interfacial trap density, hysteresis, and mobility - are characterized. The NWFETs operate effectively in integrated circuitry relying on saturation-mode operation. In sub-threshold applications such as amplifiers, we find bandwidths exceeding our cryostat wiring, but the gate hysteresis presents challenges for precise tuning of the amplifier operating point. We discuss the role of crystal imperfections and fabrication processes on the transistor characteristics and propose strategies for further improvements.