We present progress towards silica microbubble whispering gallery mode resonators as viable sources of high-quality, narrow-band single photon pairs at widely- separated wavelengths through spontaneous four-wave mixing.
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. Förtsch, G. Schunk, J. Fürst, F. Sedlmeir, D. Strekalov, H. G. L. Schwefel, T. Gerrits, M. J. Stevens, S. W. Nam, G. Leuchs, and C. Marquardt, "Highly efficient generation of narrow-band single-mode photon pairs from a whispering gallery mode resonator," in CLEO: 2014, OSA Technical Digest (online) (Optica Publishing Group, 2014), paper FW3A.6. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Single photon sources are a key building block for quantum information processing. A common approach uses spontaneous emitters based on parametric down conversion and four wave mixing. In 2005 experiments on the first spectrally engineered four wave mixing sources in fibre were published [1,2]. A primary obstacle for photonics to realize quantum-enhanced applications is loss. Designing single photon sources matched to single mode optical fibres greatly reduces coupling losses [3]. In addition, tailoring the phase matching properties of the sources to generate factorable photon pairs makes strong spectral filtering obsolete and thereby avoids the degradation of photon number correlations due to loss.