Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 59: Quantum Information: Atoms and Ions IV / Photons and Nonclassical Light II

Q 59.2: Vortrag

Freitag, 12. März 2010, 10:45–11:00, E 214

Atom-Photon-Interfaces for Single-Photon Generation and Storage — •Gunnar Langfahl-Klabes¹, Peter Nisbet¹, Jerome Dilley¹, Genko Vasilev², Daniel Ljunggren³, and Axel Kuhn¹ — ¹Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK — ²Dept. of Phys., Sofia University, Bulgaria — ³Dept. of Appl. Physics, KTH Stockholm, Sweden

Single atoms coupled to high-finesse cavities provide a unique way to deterministically generate a stream of single photons with MHz bandwidth and arbitrary pulse shape allowing for reversible state mapping. Hot atomic ensembles enable the generation, delay, storage and retrieval of single photons by manipulating an EIT control field.

In our lab we aim to generate single photons from a cavity using vacuum-stimulated Raman scattering, store them in a vapour cell, and check the retrieved photons for the preservation of their coherence properties. Generation and storage will utilise a Λ-type scheme connecting two Zeeman sub-levels in ⁸⁷Rb.

We report on the latest status of an atomic fountain as a ⁸⁷Rb source that will lead to atom-cavity interaction times of up to 5 ms, a cavity for single-photon generation that has parameters well in the strong coupling regime, and a ⁸⁷Rb vapour cell for photon storage.

A new scheme for Custom Photon Shaping [1,2] is additionally presented.
[1] Vasilev, G. et al. Phys. Rev. A 80, 013417 (2009)

[2] Vasilev, G. et al. arXiv:0906.1989v1 [quant-ph]