Jun-Chau Chien (Advisor)

Endoscopic ultrasound imaging systems require compact, low-power probes with a dense array of sensing elements. At the same time, the cabling inside the probe tube that interfaces with the external processing unit should be minimal. State-of-the-art ultrasound imagers that utilize CMUTs and PMUTs require integrating each transducer’s power-hungry analog frontend on probe, making it more difficult to satisfy the safe power limit. To address this, we propose the use of silicon microring resonators (MRRs) as ultrasound sensors. Their small element size (10-20 μm in diameter) allows us to...

Current quantum processor units (QPUs) have achieved over 1,000 qubits (e.g., IBM's Condor processor). However, scaling quantum platforms toward 1 million qubits demands breakthroughs in quantum hardware, connectivity, error correction, and system architecture. To address the scalability of quantum interconnects, Cryo-CMOS control and readout circuits have demonstrated efficacy in reducing wiring complexity, latency, and thermal loads. However, the CMOS circuits limit the active heat load to 1–2 mW/qubit, imposing a limit of approximately 1,000 qubits in state-of-the-art dilution...