Research Areas - (1) THz TWPA for Sub-mm Astronomy (NbTiN/TiN)

Full path: Physics > Quantum Sensing > Radio / RF Sensing > SQUID / JPA Quantum Amplifier > TWPA Quantum-Limited Amplifier for Axion / Dark Matter > THz TWPA for Sub-mm Astronomy (NbTiN/TiN)

Department(s)/lab(s): Physics (Astrophysics Sub-department) | Superconducting Quantum Detectors Group @ Oxford
Summary:

Tan leads the Superconducting Quantum Detectors group, holding ERC Starting and Consolidator Grants. Two main research pillars: (1) Quantum-limited SIS mixer development — pushing THz SIS heterodyne receivers above the Nb gap (~700 GHz) using NbTiN/NbN films for next-generation ALMA wideband sensitivity upgrade (Band 9) and large-format focal-plane mixer arrays for JCMT/SMA; (2) Superconducting parametric amplifiers (TWPAs) — fabricating kinetic-inductance and Josephson-junction TWPAs achieving near-quantum-limited broadband noise performance from microwave to THz, with applications to dark matter/axion searches (ABRACADABRA/prototype cavity haloscope), quantum computing qubit readout, and CMB-grade receivers. Group is transitioning TWPA fabrication in-house using Beecroft Building cleanroom. ERC Consolidator Grant awarded 2024.