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The Origin of Antibunching in Resonance Fluorescence
Epitaxial quantum dots have emerged as one of the best single-photon sources, not only for applications in photonic quantum technologies but also for testing fundamental properties of quantum optics. One intriguing observation in this area is the scattering of photons with subnatural linewidth from...
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creator | Hanschke, Lukas Schweickert, Lucas Juan Camilo López Carreño Schöll, Eva Zeuner, Katharina D Lettner, Thomas Eduardo Zubizarreta Casalengua Reindl, Marcus Saimon Filipe Covre da Silva Trotta, Rinaldo Finley, Jonathan J Rastelli, Armando Elena del Valle Laussy, Fabrice P Zwiller, Val Müller, Kai Jöns, Klaus D |
description | Epitaxial quantum dots have emerged as one of the best single-photon sources, not only for applications in photonic quantum technologies but also for testing fundamental properties of quantum optics. One intriguing observation in this area is the scattering of photons with subnatural linewidth from a two-level system under resonant continuous wave excitation. In particular, an open question is whether these subnatural linewidth photons exhibit simultaneously antibunching as an evidence of single-photon emission. Here, we demonstrate that this simultaneous observation of subnatural linewidth and antibunching is not possible with simple resonant excitation. First, we independently confirm single-photon character and subnatural linewidth by demonstrating antibunching in a Hanbury Brown and Twiss type setup and using high-resolution spectroscopy, respectively. However, when filtering the coherently scattered photons with filter bandwidths on the order of the homogeneous linewidth of the excited state of the two-level system, the antibunching dip vanishes in the correlation measurement. Our experimental work is consistent with recent theoretical findings, that explain antibunching from photon-interferences between the coherent scattering and a weak incoherent signal in a skewed squeezed state. |
doi_str_mv | 10.48550/arxiv.2005.11800 |
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subjects | Coherent scattering Continuous radiation Correlation analysis Photon emission Photons Quantum dots Quantum optics Resonance fluorescence Squeezed states (quantum theory) Wave excitation |
title | The Origin of Antibunching in Resonance Fluorescence |
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