A versatile source of single photons for quantum information processing

Förtsch M, Fürst J, Wittmann C, Strekalov D, Aiello A, Chekhova MV, Leuchs G, Silberhorn C, Marquardt C (2013)

Publication Type: Journal article

Publication year: 2013


Book Volume: 4

Article Number: 1818

DOI: 10.1038/ncomms2838


The generation of high-quality single-photon states with controllable narrow spectral bandwidths and central frequencies is key to facilitate efficient coupling of any atomic system to non-classical light fields. Such an interaction is essential in numerous experiments for fundamental science and applications in quantum communication and information processing, as well as in quantum metrology. Here we implement a fully tunable, narrow-band and efficient single-photon source based on a whispering gallery mode resonator. Our disk-shaped, monolithic and intrinsically stable resonator is made of lithium niobate and supports a cavity-assisted spontaneous parametric down-conversion process. The generated photon pairs are emitted into two highly tunable resonator modes. We verify wavelength tuning over 100 nm of both modes with controllable bandwidth between 7.2 and 13 MHz. Heralding of single photons yields anti-bunching with g (2) (0)<0.2. © 2013 Macmillan Publishers Limited. All rights reserved.

Authors with CRIS profile

Involved external institutions

How to cite


Förtsch, M., Fürst, J., Wittmann, C., Strekalov, D., Aiello, A., Chekhova, M.V.,... Marquardt, C. (2013). A versatile source of single photons for quantum information processing. Nature Communications, 4. https://doi.org/10.1038/ncomms2838


Förtsch, Michael, et al. "A versatile source of single photons for quantum information processing." Nature Communications 4 (2013).

BibTeX: Download