Research projects

Josephson-Junction-Based Non-Magnetic RF Isolator
for large scale Quantum Computing

This project aims to develop a non-magnetic,
small-form-factor RF isolator based on Josephson junctions for scalable superconducting quantum computing. 

By realizing an on-chip, low-loss, and highly isolating non-reciprocal device operable at millikelvin temperatures, the project addresses critical limitations of conventional ferrite isolators—namely magnetic interference, large footprint, and poor cryogenic compatibility.

The resulting technology will significantly reduce cryostat space and thermal load, enabling high-density quantum processor integration and next-generation quantum hardware architectures.

2D-Material-Based Gate-Tunable Josephson Parametric Amplifier

This project develops a compact Josephson parametric amplifier using gate-tunable 2D-material Josephson junctions.
Electrostatic control of the Josephson energy enables real-time tuning of gain and frequency without magnetic flux bias, reducing crosstalk and simplifying cryogenic integration.

The device aims for quantum-limited performance and scalable on-chip implementation for superconducting qubit readout and advanced quantum measurement systems.

Flexible Coaxial RF Cables for Large-Scale Quantum Computing

This project develops ultra-dense, flexible coaxial RF interconnects built on polyimide substrates with superconducting thin films such as NbTiN. 

By combining large-area sputtering, flexible-substrate fabrication, and via-hole metallization, we aim to realize compact cryogenic wiring that maintains low loss, high isolation, and mechanical robustness.

 Integration with on-substrate passive components—including filters and attenuators—enables space-efficient signal routing essential for scaling next-generation quantum processors.