Scientists have been working with lasers based on single cells for a number of years, but until now, all of them required optical resonators that were actually larger than the cell—in this new effort the researchers used a resonator so small that it was able to fit inside the cell. The point of such research is to create fluorescing cells in living organisms, which would allow researchers to track them as they go about their business, and that would offer insight into such things as how cancer cells get their start.

http://phys.org/news/2015-07-white-blood-cell...s.html#jCp



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