Implementation of a universal fine-structure eraser for quantum dots

Maeve Wentland; Sonell Malik; Andreas Fognini; Val Zwiller; Dan Dalacu; Philip Poole; Michael E. Reimer

doi:10.1117/12.2673257

19 July 2023 Implementation of a universal fine-structure eraser for quantum dots

Maeve Wentland, Sonell Malik, Andreas Fognini, Val Zwiller, Dan Dalacu, Philip Poole, Michael E. Reimer

Proceedings Volume PC12633, Photonics for Quantum 2023; PC126330N (2023) https://doi.org/10.1117/12.2673257
Event: Photonics for Quantum, 2023, Rochester, New York, United States

Abstract

Entangled photons are an important resource for quantum optics. Quantum dots are a source of on-demand and highly entangled photon pairs at a high repetition rate. However, fine structure splitting (FSS) in the biexciton-exciton cascade causes the photons to be emitted in a time-dependant state instead of an ideal Bell state. Current techniques to remove the FSS include applying a strain, electric, or magnetic field and require post-processing of the quantum dots which reduces device yield. We use a novel all-optical approach implemented by emulating a fast-rotating half-wave plate in a Lithium Niobate waveguide using a electro-optic modulator. This method allows us to frequency shift single photons and produce a time-independant entangled photon.

Conference Presentation

Citation Download Citation

Maeve Wentland, Sonell Malik, Andreas Fognini, Val Zwiller, Dan Dalacu, Philip Poole, and Michael E. Reimer "Implementation of a universal fine-structure eraser for quantum dots", Proc. SPIE PC12633, Photonics for Quantum 2023, PC126330N (19 July 2023); https://doi.org/10.1117/12.2673257

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