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Spatial coherence from Nd3+ quantum emitters mediated by a plasmonic chain.
Optics Express
|October 7, 2021
Summary
We show how to create directional, coherent light from neodymium ions (Nd3+) using silver nanoparticle chains, without needing an optical cavity. This advances nanoscale quantum devices and optical communication.
Area of Science:
- Quantum optics
- Plasmonics
- Materials science
Background:
- Controlling rare earth emitter coherence is key for quantum technologies.
- Optical cavities are typically needed but limit miniaturization.
Purpose of the Study:
- Demonstrate cavity-free directional and coherent light generation from Nd3+ ions.
- Investigate coupling rare earth ions to plasmonic nanostructures.
Main Methods:
- Coupling Nd3+ ions to the plasmonic mode of silver nanoparticle chains.
- Analyzing emission properties using Fourier microscopy.
- Performing numerical simulations for near-field coupling.
Main Results:
- Observed directional and spatially coherent emission from Nd3+ ions.
- Identified interference patterns indicating enhanced emission in specific directions.
- Confirmed the necessity of near-field coherent coupling via simulations.
Conclusions:
- Achieved cavity-free control over rare earth emitter coherence at room temperature.
- Demonstrated potential for nanoscale hybrid devices in quantum information and optical communication.
