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Meanwhile, various methods to manipulate particles have been studied both theoretically and experimentally over the past few decades(1-3). Those earlier studies have led to the success of laser atomic-cooling and -trapping which have given rise to the creation of ultracold atoms[MOT, Sisyphus, molasses, zeeman]. Ultracold atoms turned out to be a powerful tool to realize the atomic optics by allowing us to prepare sources of coherent atomic waves [quantum ref Shimizu, MIT, interf]. quantum reflection 넣을까.. ? Thus, the development of atom optics has been opened up based on those studies of controlling the motion of the atoms.
Furthremore, advanced technical developments in laser and nanotechnology have provided a major breakthrough in developing proper optical instruments such as mirrors and gratings. At an earlier stage, laser-tuning enables us to observe Bragg scattering and Kapitza-Dirac effect of atomic waves by adjusting detuning frequency[ref] and it motivated the first approach(or implementation of) to the practical atomic mirror which refers to as evanescent wave mirror [ref]. Besides, establishment of nano-fabricated devices can serve as matter-wave optics such as transmission grating[ref] and Fresnel zone plate[ref].
However, (further application/studies are in need of understanding of atom-surface interaction, size-limit, ultracold atom base 면 cluster study 불가능, )
QR 은 atom-surface interaction 을 이해하는 좋은 툴이자 좋은 mirror 이다. 근데 이거가 ultracold 일수도 있고 ㅇㅇㅇㅇㅇㅇㅇㅇㅇㅇ
Recently - half plane을 받을지... qr을 받을지.. , a totally new mechanism of matter-wave reflection has been demonstrated by observing quantum refleciton of metastable neon atoms from the solid surface. Quantum reflection is