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

Francesco Basso BassetMichele B. RotaMattia Beccaceci ...+10 Rinaldo Trotta
Dec 2022
摘要
Two-photon resonant excitation of the biexciton-exciton cascade in a quantumdot generates highly polarization-entangled photon pairs in anear-deterministic way. However, there are still open questions on the ultimatelevel of achievable entanglement. Here, we observe the impact of thelaser-induced AC-Stark effect on the spectral emission features and onentanglement. A faster shorter emission time, longer laser pulse duration, andhigher pump power all result in lower values of concurrence. Nonetheless,additional contributions are still required to fully account for the observedbelow-unity concurrence.
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