By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Science. According to news reporting originating in Stuttgart, Germany, by NewsRx journalists, research stated, "Future quantum communication will rely on the integration of single-photon sources, quantum memories and systems with strong single-photon nonlinearities(1). Two key parameters are crucial for the single-photon source: a high photon flux with a very small bandwidth, and a spectral match to other components of the system."
The news reporters obtained a quote from the research from Max Planck Institute for Solid State Research, "Atoms or ions may act as single-photon sources-owing to their narrow-band emission and their intrinsic spectral match to other atomic systems-and can serve as quantum nonlinear elements. Unfortunately, their emission rates are still limited, even for highly efficient cavity designs(2). Single solid-state emitters such as single organic dye molecules are significantly brighter(3) and allow for narrowband photons(4); they have shown potential in a variety of quantum optical experiments(5,6) but have yet to be interfaced with other components such as stationary memory qubits. Here we describe the optical interaction between Fourier-limited photons from a single organic molecule and atomic alkali vapours, which can constitute an efficient quantum memory. Single-photon emission rates reach up to several hundred thousand counts per second and show a high spectral brightness of 30,000 detectable photons per second per megahertz of bandwidth. The molecular emission is robust and we demonstrate perfect tuning to the spectral transitions of the sodium D line and efficient filtering, even for emitters at ambient conditions. In addition, we achieve storage of molecular photons originating from a single dibenzanthanthrene molecule in atomic sodium vapour."
According to the news reporters, the research concluded: "Given the large set of molecular emission lines matching to atomic transitions, our results enable the combination of almost ideal single-photon sources with various atomic vapours, such that experiments with giant single photon nonlinearities, mediated, for example, by Rydberg atoms(7,8), become feasible."
For more information on this research see: Molecular photons interfaced with alkali atoms. Nature, 2014;509(7498):66-70,127-129. Nature can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature - www.nature.com/nature/)
Our news correspondents report that additional information may be obtained by contacting P. Siyushev, Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany. Additional authors for this research include G. Stein, J.R. Wrachtrup and I. Gerhardt (see also Science).
Keywords for this news article include: Europe, Germany, Science, Stuttgart
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC