| Autor: |
Yu Y; Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, The Netherlands., Oser D; QuTech, Delft University of Technology, 2628CJ Delft, The Netherlands., Da Prato G; Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, The Netherlands., Urbinati E; Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, The Netherlands., Ávila JC; Department of Applied Physics, University of Geneva, 1211 Geneva, Switzerland.; Constructor University Bremen, 28759 Bremen, Germany., Zhang Y; Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, The Netherlands., Remy P; SIMH Consulting, Rue de Genève 18, 1225 Chêne-Bourg, Switzerland., Marzban S; QuTech, Delft University of Technology, 2628CJ Delft, The Netherlands., Gröblacher S; Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, The Netherlands., Tittel W; QuTech, Delft University of Technology, 2628CJ Delft, The Netherlands.; Department of Applied Physics, University of Geneva, 1211 Geneva, Switzerland.; Constructor University Bremen, 28759 Bremen, Germany. |
| Abstrakt: |
Single quantum emitters embedded in solid-state hosts are an ideal platform for realizing quantum information processors and quantum network nodes. Among the currently investigated candidates, Er^{3+} ions are particularly appealing due to their 1.5 μm optical transition in the telecom band as well as their long spin coherence times. However, the long lifetimes of the excited state-generally in excess of 1 ms-along with the inhomogeneous broadening of the optical transition result in significant challenges. Photon emission rates are prohibitively small, and different emitters generally create photons with distinct spectra, thereby preventing multiphoton interference-a requirement for building large-scale, multinode quantum networks. Here we solve this challenge by demonstrating for the first time linear Stark tuning of the emission frequency of a single Er^{3+} ion. Our ions are embedded in a lithium niobate crystal and couple evanescently to a silicon nanophotonic crystal cavity that provides a strong increase of the measured decay rate. By applying an electric field along the crystal c axis, we achieve a Stark tuning greater than the ion's linewidth without changing the single-photon emission statistics of the ion. These results are a key step towards rare earth ion-based quantum networks. |
