Platform
Erbium-based crystals and hybrid rare-earth magnetic systems.
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04 · Joint Programme with A*STAR Q.INC
Rare-earth quantum interfaces
Rare-earth spins and collective magnetic excitations offer a route between microwave quantum systems and telecom-band light.
The question
What becomes visible when the probe is part of the system?
Can magnons mediate a coherent exchange between microwave and optical photons? Together with A*STAR Q.INC, we study erbium-based systems in which rare-earth transitions, magnetic order and light can be engineered as one interface.
How we approach it
Platform, measurement, target
Measurement
Cryogenic optical spectroscopy, coherent microwave control and magnon spectroscopy.
Scientific target
Coherent microwave-to-optical transduction through rare-earth–magnon interactions.
Current directions
Questions in motion
These project areas evolve as experiments and collaborations develop.
Rare-earth–magnon coupling
Mapping how erbium spins hybridise with collective magnetic modes across field and frequency.
Microwave access
Driving and reading magnetic excitations while preserving the coherence needed for transduction.
Telecom optical interface
Connecting those excitations to erbium optical transitions at useful wavelengths.
Collaborating withJian-Rui Soh · A*STAR Quantum Innovation Centre (Q.InC)
Selected reading
Related publications
APL Photonics · 2025
Brillouin–Mandelstam Scattering in Telecommunications Optical Fiber at Millikelvin Temperatures
E. A. Cryer-Jenkins, A. C. Leung, H. Rathee, A. K. C. Tan, K. D. Major & M. R. Vanner
Read paper ↗ACS Applied Electronic Materials · 2024Evidencing Dissipation Dilution in Large-Scale Arrays of Single-Layer WSe₂ Mechanical Resonators
M. R. Pitts, M. S. G. Feuer, A. K. C. Tan, et al.
Read paper ↗Nature Materials · 2024Revealing Emergent Magnetic Charge in an Antiferromagnet with Diamond Quantum Magnetometry
A. K. C. Tan, H. Jani, M. Högen, L. Stefan, et al.
Read paper ↗ACS Nano · 2023Imaging Nucleation and Propagation of Pinned Domains in Few-Layer Fe₅₋ₓGeTe₂
M. Högen, R. Fujita, A. K. C. Tan, A. A. Geim, et al.
Read paper ↗Work with us