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Updated: Jul 20, 2026
15:47
Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
16.2K
Nano antenna-assisted quantum dots emission into high-index planar waveguide.
X Yu1, J-C Weeber1, L Markey1
1Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), CNRS UMR 6303, Université de Bourgogne, BP 47870, F-21078 Dijon, France.
Nanotechnology
|March 24, 2024
Summary
We developed a Yagi-Uda antenna to achieve directional quantum dot (QD) emission coupling into a titanium dioxide (TiO2) waveguide. This hybrid plasmonic/photonic approach enhances light transfer for quantum photonic circuits.
Area of Science:
- Quantum photonics
- Nanophotonics
- Materials science
Background:
- Efficient coupling of quantum emitters to photonic waveguides is crucial for integrated quantum photonic circuits.
- Hybrid plasmonic/photonic platforms offer enhanced light confinement for efficient coupling.
Purpose of the Study:
- To establish directional quantum dot (QD) emission coupling into a planar titanium dioxide (TiO2) waveguide.
- To utilize a Yagi-Uda antenna for optimizing light transfer in a hybrid platform.
Main Methods:
- Designing a Yagi-Uda antenna by scaling radio frequency dimensions to nano-optics.
- Optimizing the antenna design using full numerical simulations.
- Fabricating the antenna on a TiO2 planar waveguide and depositing QDs.
Main Results:
- Demonstrated clear directional coupling of QD emission into the TiO2 waveguide.
- Observed coupling originating from the antenna effect.
- Estimated coupling efficiency and directivity of emitted light.
Conclusions:
- The Yagi-Uda antenna effectively facilitates directional coupling of quantum dot emission into a hybrid plasmonic/photonic waveguide.
- This method shows promise for improving light transfer in integrated quantum photonic devices.
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