Germanium defects tagged posts

Single GeV center in diamond. (left) Fluorescence mapping and (right) atomic structure model. Credit: Tokyo Institute of Technology Read more at: http://phys.org/news/2015-09-diamond-bright-luminescence-quantum-crypotography.html#jCp

Germanium defects in a diamond crystal lattice act as a reliable source for single photons. Pure diamonds are naturally colorless, but gaps in the crystal structure or impurities of other elements can create colors and even emit fluorescence. Recently, researchers have shown that the fluorescent lattice defects could be useful as single photon sources for quantum cryptography and as bright luminescent makers in living cells.

Now a new type of diamond crystal defect that fluoresces to produce single photons in a narrow, high energy wavelength band has been demo...