Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 38: Ultra-cold atoms, ions and BEC II (with A)
Q 38.1: Vortrag
Mittwoch, 2. März 2016, 14:30–14:45, f303
Time-resolved Scattering of a Single Photon by a Single Atom — •Victor Leong1,2, Mathias Alexander Seidler1, Matthias Steiner1,2, Alessandro Cerè1, and Christian Kurtsiefer1,2 — 1Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543 — 2Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
The efficiency of light-matter interfaces between single photons and single atoms depends on the bandwidth and temporal shape of the single photon, and is crucial for realistic implementations of many quantum information protocols. In particular, an exponentially rising single photon is predicted to excite a single atom with a higher efficiency compared to any other temporal shape [1].
A four-wave mixing photon pair source, in conjunction with an asymmetric cavity, generates heralded single photons of tunable bandwidth with exponentially decaying or rising shapes [2,3]. We combine the photon pair source with a trapped single atom and investigate the free space scattering for different bandwidths and temporal shapes.
We study the scattering dynamics by measuring the atomic emission and the reduction in the number of transmitted photons. We observe that the atomic absorption dynamics are imprinted in the single-photon excitation mode.
[1] Y. Wang et al., PRA 83, 063842 (2011)
[2] B. Srivathsan et al., PRL 111, 123602 (2013)
[3] B. Srivathsan et al., PRL 113, 163601 (2014)