  We demonstrate the coupling of a single nitrogen vacancy center in a
nanodiamond to propagating plasmonic modes of mechanically etched silver
nanowires. The mechanical etch is performed on single crystalline silver
nanoplates by the tip of an atomic force microscope cantilever to produce wires
with pre-designed lengths. We show that single plasmon propgation can be
obtained in these wires, thus making these structures a platform for quantum
information processing.
