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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Tailoring polarization in WSe₂ quantum emitters through deterministic strain engineering.

Athanasios Paralikis¹, Claudia Piccinini¹, Abdulmalik A Madigawa¹

¹Department of Electrical and Photonics Engineering, Technical University of Denmark, Ørsteds Plads, 2800 Kongens Lyngby, Denmark.

NPJ 2D Materials and Applications

|September 13, 2024

Summary

This summary is machine-generated.

Researchers developed a method to control quantum emitter polarization in tungsten diselenide (WSe2) monolayers using nanopillar strain. This enables highly polarized single photons for quantum technologies.

Keywords:

Lasers, LEDs and light sources Two-dimensional materials

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Area of Science:

Quantum optics
Materials science
Nanotechnology

Background:

Transition metal dichalcogenides (TMDs) are promising for quantum information processing.
Generating single photons with controlled polarization is crucial for optical quantum technologies.

Purpose of the Study:

To deterministically control the polarization of quantum emitters in tungsten diselenide (WSe2) monolayers.
To achieve high-quality single-photon generation for photonic quantum technologies.

Main Methods:

Fabrication of WSe2 monolayers on novel nanopillar geometries.
Inducing directional strain in the WSe2 monolayer via nanopillar tips.
Characterization of quantum emitter polarization and single-photon purity.

Main Results:

Achieved deterministic control over quantum emitter polarization.
Fabricated WSe2 emitters produced single photons with 99 ± 4% polarization.
Demonstrated high single-photon purity with g(2)(0) = 0.030 ± 0.025.

Conclusions:

Novel nanopillar geometries enable precise strain engineering for controlled quantum emitter polarization.
This approach is vital for developing integrated TMD-based quantum photonic devices.
Paves the way for scalable and deterministic photonic quantum technologies.