Signatures of the Optical Stark Effect on Entangled Photon Pairs from Resonantly-Pumped Quantum Dots

• URL: http://arxiv.org/abs/2212.07087v3
• Date: Wed, 2 Aug 2023 13:54:20 GMT
• Title: Signatures of the Optical Stark Effect on Entangled Photon Pairs from Resonantly-Pumped Quantum Dots
• Authors: Francesco Basso Basset, Michele B. Rota, Mattia Beccaceci, Tobias M. Krieger, Quirin Buchinger, Julia Neuwirth, H\^elio Huet, Sandra Stroj, Saimon F. Covre da Silva, Giuseppe Ronco, Christian Schimpf, Sven H\"ofling, Tobias Huber-Loyola, Armando Rastelli, Rinaldo Trotta
• Abstract summary: Two-photon resonant excitation of the biexciton-exciton cascade in a quantum dot generates highly polarization-entangled photon pairs. We observe the impact of the laser-induced AC-Stark effect on the quantum dot emission spectra and on entanglement.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Two-photon resonant excitation of the biexciton-exciton cascade in a quantum dot generates highly polarization-entangled photon pairs in a near-deterministic way. However, the ultimate level of achievable entanglement is still debated. Here, we observe the impact of the laser-induced AC-Stark effect on the quantum dot emission spectra and on entanglement. For increasing pulse-duration/lifetime ratios and pump powers, decreasing values of concurrence are recorded. Nonetheless, additional contributions are still required to fully account for the observed below-unity concurrence.

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