trapping cooling technique  은 overcome 하는데 딱  have provided a major breakthrough in developing atom-optical instruments like mirrors and grating
 Meanwhile, numerous methods to manipulate particles have been studied both theoretically and experimentally over the past few decades(1-3). Those earlier studies have given rise to the success of atomic-cooling and -trapping which has been act as a powerful tool to realize the atomic optics by allowing us to prepare sources of coherent atomic waves [quantum ref Shimizu, MIT, interf]. Magneto-optically trapped(MOT) metastable neon atoms, for instance, has led to the first observation of quantum reflection of matter-wave from the solid surface in 2000 [ref]. Thus, the development of atom optics has been opened up based on those studies of controlling the motion of the atoms as well as technical development.
 Furthremore,