Optimal Broadband Frequency Conversion via a Magnetomechanical Transducer

Physical Review Applied, vol. 18

Abstract

Developing schemes for efficient and broadband frequency conversion of quantum signals is an ongoing challenge in the field of modern quantum information. The coherent conversion between microwave and optical signals is an especially important milestone towards long-distance quantum communication. In this work, we propose a two-stage conversion protocol, employing a resonant interaction between magnetic and mechanical excitations as a mediator between microwave and optical photons. Based on estimates for the coupling strengths under optimized conditions for yttrium iron garnet, we predict close to unity conversion efficiency without the requirement of matching cooperativities. We predict a conversion bandwidth in the regions of largest efficiency of the order of magnitude of the coupling strengths that can be further increased at the expense of reduced conversion efficiency.

Authors 5

1. F. Engelhardt Aachen Institute for Theoretical Solid State Physics

   Friedrich-Alexander-Universität Erlangen-Nürnberg · Max Planck Institute for the Science of Light · RWTH Aachen University

   Affiliation as printed

   Department of Physics, University Erlangen-Nuremberg, Staudtstr. 7, PLZ Erlangen 91058, Germany

   Institute for Theoretical Solid State Physics, RWTH Aachen University, Aachen 52074, Germany

   Max Planck Institute for the Science of Light, Staudtstr. 2, PLZ Erlangen 91058, Germany

2. Victor A. S. V. Bittencourt

   Max Planck Institute for the Science of Light

   Affiliation as printed

   Max Planck Institute for the Science of Light, Staudtstr. 2, PLZ Erlangen 91058, Germany

3. Hans Huebl

   Bavarian Academy of Sciences and Humanities · Munich Center for Quantum Science and Technology · Walther Meissner Institute · Technical University of Munich

   Affiliation as printed

   Munich Center for Quantum Science and Technology (MCQST), Munich D-80799, Germany

   Physik-Department, Technische Universität München, Garching D-85748, Germany

   Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching D-85748, Germany

4. O. Klein

   Institut polytechnique de Grenoble · Centre National de la Recherche Scientifique · Commissariat à l'Énergie Atomique et aux Énergies Alternatives · CEA Grenoble · Spintronique et Technologie des Composants · Université Grenoble Alpes

   Affiliation as printed

   Université Grenoble Alpes, CEA, CNRS, Grenoble INP, Spintec, Grenoble 38054, France

5. Silvia Viola Kusminskiy Aachen Institute for Theoretical Solid State Physics

   Max Planck Institute for the Science of Light · RWTH Aachen University

   Affiliation as printed

   Institute for Theoretical Solid State Physics, RWTH Aachen University, Aachen 52074, Germany

   Max Planck Institute for the Science of Light, Staudtstr. 2, PLZ Erlangen 91058, Germany