A note -- if you're linking to arXiv, it's better to link to the abstract (http://arxiv.org/abs/1505.04254) rather than directly to the PDF. From the abstract, one can easily click through to the PDF; not so the reverse. And the abstract allows one to do things like see different versions of the paper, search for other things by the same authors, etc. Thank you!
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[ 4.6 ms ] story [ 90.5 ms ] threadhttp://www.nature.com/nphoton/journal/vaop/ncurrent/full/nph...