Controlled synthesis of high quality micro/nano-diamonds by microwave plasma chemical vapor deposition

Abstract

Diamond containing engineered color centers is rapidly becoming a medium of choice for quantum information applications. Many of the dramatic recent results in this field have been demonstrated in diamond nano-crystals. Here we demonstrate controlled synthesis of spatially isolated high quality micro- and nano-diamonds using a microwave plasma chemical vapor deposition technique (MPCVD). The growth from nano-seeds rather than other nucleation techniques allows improved control over the final size of the crystals and the density of the crystals on the substrate. The growth rate of the diamond crystals was found to be 22 nm/min. Various parameters of the growth sequence were studied and the mi..