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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Widely tunable, efficient on-chip single photon sources at telecommunication wavelengths
Thang B Hoang1, Johannes Beetz, Matthias Lermer
1COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, NL-5600MB Eindhoven, The Netherlands. t.b.hoang@tue.nl
Optics Express
|October 6, 2012
Summary
We demonstrate tunable on-chip single photon sources using quantum dots (QDs) in photonic crystal waveguides (PhC WGs). These sources offer real-time emission tuning and high coupling efficiency for quantum photonic integrated circuits.
Area of Science:
- Quantum Optics
- Solid-State Physics
- Nanophotonics
Background:
- Single photon sources are crucial for quantum technologies.
- Integrating these sources into scalable photonic circuits remains a challenge.
Purpose of the Study:
- To demonstrate tunable on-chip single photon sources.
- To achieve high coupling efficiency between quantum dots and photonic crystal waveguides.
Main Methods:
- Utilizing Stark tuning of single quantum dot (QD) excitonic transitions.
- Employing short photonic crystal waveguides (PhC WGs).
- Applying bias voltage for real-time tuning.
Main Results:
- Achieved real-time emission tuning of 9 nm with <2V bias.
- Maintained high coupling efficiency (β ≥ 65%) over a 5 nm wavelength range.
- Observed maximum coupling efficiency (β = 88%) when QD was resonant with the Fabry-Perot mode.
Conclusions:
- Demonstrated a viable method for tunable on-chip single photon sources.
- High coupling efficiency is achievable within PhC WGs.
- Represents a significant advancement for scalable quantum photonic integrated circuits.
