I am partial to Eric Heller's wonderful images of electron transport, which recieved attention in the art world (even though they are the product of imaging of scientific simulation). Any one of them would make a fantastic logo, and get him some more recognition, and they are visually arresting, and very contemporary-looking. Here's the one I found first (I like it):
This is transport 3 (it looks good small, but one should ask Eric's permission, of course).
There's also Transport 6:
And a nice one, transport II
These are all very nice contemporary artworks, they depict some visualization of a 2d electron flow, and are pure physics.
If you would like to see what can be done with these, here is a modified Heller image, color-adjusted with a hand-painted hbar, that Heller probably wouldn't even recognize.