Multi-photon emission from a resonantly pumped quantum dot
- Author(s)
- F. Giorgino, P. Zahálka, L. Jehle, L. Carosini, L. M. Hansen, J. C. Loredo, P. Walther
- Abstract
Resonance fluorescence of natural or artificial atoms constitutes a prime method for generating non-classical light. While most efforts have focused on producing single photons, multi-photon emission is unavoidably present in the resonant driving of an atom. Here, we study the extent to which these processes occur: we quantify the multi-photon emission statistics in a resonantly driven two-level artificial atom---a semiconductor quantum dot in a micropillar cavity---when pumped by short optical pulses. By measuring auto-correlation functions up to the fourth order, we observe up to four photons emitted after a single pumping pulse and investigate the emission dynamics with finely resolved temporal measurements. Furthermore, we propose a method based on acquisition time gating to enhance the purity of a single-photon source while maintaining high efficiencies. Our results deepen the understanding of the photon emission processes in coherently driven atomic systems and suggest a simple but effective technique to reduce the multi-photon components of a single-photon source.
- Organisation(s)
- Quantum Optics, Quantum Nanophysics and Quantum Information, Research Network Quantum Aspects of Space Time
- External organisation(s)
- Österreichische Akademie der Wissenschaften (ÖAW)
- Journal
- Optica Quantum
- Volume
- 3
- Pages
- 402-407
- No. of pages
- 6
- DOI
- https://doi.org/10.1364/OPTICAQ.557604
- Publication date
- 08-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103026 Quantum optics
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/c0de1988-42dd-42b8-bd1a-048ae03057c3