Efficient microwave to optical photon conversion: An electro-optical realization Journal Article

Author(s): Rueda, Alfredo; Sedlmeir, Florian; Collodo, Michele C; Vogl, Ulrich; Stiller, Birgit; Schunk, Gerhard; Strekalov, Dmitry V; Marquardt, Christoph W; Fink, Johannes; Painter, Oskar J; Leuchs, Gerd; Schwefel, Harald G
Article Title: Efficient microwave to optical photon conversion: An electro-optical realization
Affiliation IST Austria
Abstract: Linking classical microwave electrical circuits to the optical telecommunication band is at the core of modern communication. Future quantum information networks will require coherent microwave-to-optical conversion to link electronic quantum processors and memories via low-loss optical telecommunication networks. Efficient conversion can be achieved with electro-optical modulators operating at the single microwave photon level. In the standard electro-optic modulation scheme, this is impossible because both up- and down-converted sidebands are necessarily present. Here, we demonstrate true single-sideband up- or down-conversion in a triply resonant whispering gallery mode resonator by explicitly addressing modes with asymmetric free spectral range. Compared to previous experiments, we show a 3 orders of magnitude improvement of the electro-optical conversion efficiency, reaching 0.1% photon number conversion for a 10 GHz microwave tone at 0.42 mW of optical pump power. The presented scheme is fully compatible with existing superconducting 3D circuit quantum electrodynamics technology and can be used for nonclassical state conversion and communication. Our conversion bandwidth is larger than 1 MHz and is not fundamentally limited.
Journal Title: Optica
Volume: 3
Issue 6
ISSN: 2334-2536
Publisher: OSA Publishing  
Date Published: 2016-06-20
Start Page: 597
End Page: 604
Copyright Statement: © 2016 Optical Society of America
Sponsor: Alexander von Humboldt Foundation; Studienstiftung des Deutschen Volkes. We would like to acknowledge our stimulating discussions with Konrad Lehnert and Alessandro Pitanti.
DOI: 10.1364/OPTICA.3.000597
Open access: yes (OA journal)