morganism - 7-5-2013 at 21:47
arXiv:1305.1515v1 [physics.optics] 7 May 2013
Observation of nitrogen vacancy photoluminescence from an
optically levitated nanodiamond
http://arxiv.org/pdf/1305.0155.pdf
Pretty fun, wonder what would happen with a UV laser, and some flourescent minerals with trapped inclusions....