Regensburg 2022 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 8: Quantum Dots and Wires 2: Optics 1
HL 8.10: Talk
Monday, September 5, 2022, 18:00–18:15, H32
The Origin of Antibunching in Resonance Fluorescence — •Lukas Hanschke1,2, Lucas Schweickert3, Juan Camilo López Carreño4, Eva Schöll1,3, Katharina D. Zeuner3, Thomas Lettner3, Eduardo Zubizarreta Casalengua4, Marcus Reindl5, Saimon Filipe Covre da Silva5, Rinaldo Trotta6, Jonathan J. Finley2, Armando Rastelli5, Elena del Valle4,7, Fabrice P. Laussy4,8, Val Zwiller3, Kai Müller2, and Klaus D. Jöns1 — 1PhoQS, CeOPP, and Department of Physics, Paderborn University, Germany — 2WSI, MCQST and TU Munich, Germany — 3KTH Stockholm, Sweden — 4University of Wolverhampton, UK — 5JKU Linz, Austria — 6Sapienza University Rome, Italy — 7Universidad Autónoma de Madrid, Spain — 8Moscow, Russia
We present measurements that prove that the simultaneous observation of sub-natural linewidth and antibunching of resonance fluorescence is not possible. High-resolution spectroscopy reveals the sharp spectral feature of the weak driving regime with a vanishing component of incoherently scattered light. Filtering the emission in the order of the Fourier limited linewidth leads to the loss of antibunching in the correlation measurement. Our theoretical model identifies two-photon interference between the coherent and incoherently scattered light as the origin of antibunching. This prefigures schemes to achieve a source of single photons with sub-natural linewidth [PRL 123, 170402 (2020)].