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Q: Fachverband Quantenoptik und Photonik

Q 21: Quantum Communication III

Q 21.6: Vortrag

Dienstag, 12. März 2024, 12:15–12:30, HS 3219

Frequency Conversion in a high pressure hydrogen gas — •Anica Hamer¹, Priyanka Yashwantrao¹, Seyed Mahdi Razavi Tabar¹, Alireza Aghababaei¹, Frank Vewinger², and Simon Stellmer¹ — ¹Physikalisches Institut, Nussallee 12, Universität Bonn, 53115 Bonn, Germany — ²Institut für Angewandte Physik, Wegelerstraße 8, Universität Bonn

Quantum networks, as envisioned for quantum computation and quantum communication applications, are based on a hybrid architecture. Such a layout may include solid-state emitters, network nodes based on single or few atoms or ions, and photons as so-called flying qubits. This concept requires an efficient and entanglement-preserving exchange of photons between the individual components, which often entails frequency conversion of the photon.

Our approach is based on coherent Stokes and anti-Stokes Raman scattering (CSRC and CARS) in dense molecular hydrogen gas. This four-wave mixing process sidesteps the limitations imposed by crystal properties, it is intrinsically broadband and does not generate an undesired background. We have demonstrated conversion between 434 nm (F donors in ZnSe) to 370nm (Yb⁺ ions) and between 863 nm (InAs/GaAs quantum dots) and the telecom O-band. We will present first steps towards integrated frequency conversion in gas-filled hollow-core fibers.

Keywords: Frequency Conversion; Quantum Dots; Four-Wave-Mixing; Qubits