2023/10/18 by Martin Bergen, Bergen, Martin, Valentin Walther +11
Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.2310.11726
openalex publication_date 2023/10/18 · openalex created_date 2023/10/21 · openalex updated_date 2026/07/28
We investigate the interaction between highly excited Rydberg excitons and charged impurities in the semiconductor Cuprous Oxide. We find that it is long-ranged and based on charge-induced dipole interactions. We demonstrate that we can utilize this interaction to neutralize impurities throughout the whole crystal - an effect we call purification. Purification reduces detrimental electrical stray fields drastically. We find that the absorption of the purified crystal increases by up to 25 % and that the purification effect is long-lived and may persist for hundreds of microseconds or even longer. Using a time-resolved pump-probe technique, we can discriminate purification from Rydberg blockade, which has been a long-standing goal in excitonic Rydberg systems.