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Unidirectional output from a quantum-dot single-photon source hybrid integrated on silicon
Optics Express
|November 23, 2021
Summary
We developed a hybrid quantum-dot single-photon source on a silicon waveguide with a photonic crystal mirror for efficient, unidirectional light output. This breakthrough advances scalable quantum photonics integration.
Area of Science:
- Quantum photonics
- Integrated optics
- Nanophotonics
Background:
- Single-photon sources are crucial for quantum technologies.
- Efficient light extraction and directionality are key challenges in hybrid integration.
Purpose of the Study:
- To demonstrate a hybrid quantum-dot single-photon source (QD SPS) integrated onto a silicon waveguide.
- To achieve efficient unidirectional output of single photons using a photonic crystal mirror.
Main Methods:
- Hybrid integration of a QD SPS onto a silicon waveguide using transfer printing.
- Incorporation of a photonic crystal mirror for photon reflection and unidirectional coupling.
- Design of a subwavelength grating silicon waveguide to maintain efficiency despite misalignment.
Main Results:
- Successful demonstration of single-photon generation from the QD.
- Achieved efficient unidirectional output of single photons from the waveguide.
- Validated the robustness of the subwavelength grating waveguide against stacking misalignment.
Conclusions:
- The developed hybrid QD SPS on a silicon waveguide offers a promising platform for scalable quantum photonics.
- This approach facilitates the integration of single-photon sources into complex photonic circuits.
- The technology paves the way for advanced quantum communication and computing systems.
