Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 11: Quantum Optics I

Q 11.2: Talk

Monday, March 9, 2020, 14:15–14:30, f342

Spectral properties of single photons from a single ⁴⁰Ca⁺ ion — Matthias Kreis, •Omar Elshehy, and Jürgen Eschner — Universität des Saarlandes, Experimentalphysik, 66123 Saarbrücken

Single photons with well-controlled spectral and temporal properties are an essential resource for optical quantum communication protocols such as quantum repeaters.

We investigate single photons at 393 nm wavelength generated from a single ⁴⁰Ca⁺-ion by a controlled Raman scattering process in the Λ-shaped 3-level configuration consisting of the D_5/2 (m=−5/2), P_3/2 (m=−3/2), and S_1/2 (m=−1/2) Zeeman levels.

The spectral properties of the Raman photons are analyzed by a 396 mm long scanning Fabry-Perot cavity with 1 MHz transmission bandwidth stabilized to a 393 nm reference laser. Spectra are taken for various values of Rabi frequencyy and detuning of the 854 nm driving laser, and compared to calculated spectra, following the theory in [1].

[1] P. Müller et al., Phys. Rev. A 96, 023861 (2017).