Quantum Science and Technology · Research School of Physics
Implanted Rare-Earth Emitters in Dielectric Metasurfaces for Active Control of Light Emission
Fengkai Wei · Dual ANU / Friedrich Schiller University PhD Student
Why active metasurfaces?
Can engineered optical resonances control how embedded emitters radiate?
Conventional metasurfaceEmitters sit on or near the nanostructure.
→
Embedded-emitter platformRare-earth ions interact directly with the meta-atom mode.
Scientific idea
Er³⁺
↗ ↖
SiN meta-atomSelective implantationResonant field localization
Design principle
The emission enhancement is related to the optical quality factor and mode volume:
Higher Q and smaller V increase the local density of optical states.
From design to measurement
01FDTD designSiN on SiO₂
02FabricationEBL + etching
03Er³⁺ implantationUniform or selective
04CharacterizationSEM · PL · lifetime
Uniform implantation enhances emission
16×photoluminescence enhancement
compared with unpatterned regions
compared with unpatterned regions
The metasurface resonance concentrates the optical field where the emitters are embedded.
Spatially selective implantation
Positioning Er³⁺ ions inside different regions of the meta-atom changes which optical channel is addressed.
Electric dipole (ED)Implantation region matched to the ED field distribution.
Magnetic dipole (MD)Implantation region matched to the MD field distribution.
Key result
Embeddedemitters become part of the optical design space
Tailoredresonances control ED and MD emission channels
Scalableplatform for active nanophotonics and integrated quantum photonics
Thank you
Questions and discussion
