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-to-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.

Signatures of the optical stark effect on entangled photon pairs from resonantly pumped quantum dots / Basso Basset, F; Rota, M B; Beccaceci, M; Krieger, T M; Buchinger, Q; Neuwirth, J; Huet, H; Stroj, S; Covre da Silva, S F; Ronco, G; Schimpf, C; Höfling, S; Huber-Loyola, T; Rastelli, A; Trotta, R. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:16(2023), p. 166901. [10.1103/PhysRevLett.131.166901]

Signatures of the optical stark effect on entangled photon pairs from resonantly pumped quantum dots

Basso Basset, F
Co-primo
;
Rota, M B
Co-primo
;
Beccaceci, M;Neuwirth, J;Huet, H;Ronco, G;Trotta, R
Ultimo
2023

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-to-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.
2023
exciton; photon; entanglement; Stark effect; quantum dot; semiconductor; optical microcavities; coherent control
01 Pubblicazione su rivista::01a Articolo in rivista
Signatures of the optical stark effect on entangled photon pairs from resonantly pumped quantum dots / Basso Basset, F; Rota, M B; Beccaceci, M; Krieger, T M; Buchinger, Q; Neuwirth, J; Huet, H; Stroj, S; Covre da Silva, S F; Ronco, G; Schimpf, C; Höfling, S; Huber-Loyola, T; Rastelli, A; Trotta, R. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:16(2023), p. 166901. [10.1103/PhysRevLett.131.166901]
File allegati a questo prodotto
File Dimensione Formato  
BassoBasset_Signatures_2023.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 814.13 kB
Formato Adobe PDF
814.13 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1692850
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact