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Super-Radiant Emission from Quantum Dots in a Nanophotonic Waveguide
Je-Hyung Kim1,2, Shahriar Aghaeimeibodi2, Christopher J K Richardson3
1Department of Physics , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea.
Nano Letters
|July 3, 2018
Summary
Researchers demonstrated quantum interactions between two quantum dots on a chip. This breakthrough in quantum dots and nanophotonics enables faster collective emission for future quantum information processing.
Area of Science:
- Quantum physics
- Nanophotonics
- Quantum information processing
Background:
- Scalable photonic quantum information processing requires integrating multiple quantum emitters on a chip.
- Quantum dots are ideal on-chip quantum light sources, but achieving interaction is challenging due to random frequencies and positions.
Purpose of the Study:
- To demonstrate quantum interactions between separated quantum dots on a nanophotonic waveguide.
- To overcome spectral mismatch and enable long-range quantum interaction between quantum dots.
Main Methods:
- Integrating two quantum dots to the same optical mode of a nanophotonic waveguide.
- Utilizing on-chip thermal tuners to overcome spectral mismatch.
- Observing photon-mediated long-range interaction and super-radiant emission.
Main Results:
- Achieved photon-mediated long-range quantum interaction between two separated quantum dots.
- Observed super-radiant emission, where the quantum dots collectively emit faster than individually.
- Demonstrated overcoming spectral mismatch using on-chip thermal tuners.
Conclusions:
- Integrated quantum emitters exhibiting long-range quantum interactions can be created using super-radiant emission.
- This work is a significant step toward developing photonic quantum information processors with multiple interacting quantum emitters on a semiconductor chip.
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