並列摘要
We develop a novel lensless imaging method to reconstruct the 2D phase image of cold atomic cloud by measuring the far field distributions of the scattered beam using a Mach-Zehnder interfereometer, and accompanying with phase shifting interferometry (PSI). This scheme allows to deposit extremely small heating to the atoms due to far-off resonance and low power probe beam is used, and is intrinsically a nondestructive means. In this thesis, I will first introduce the working principle, special features and the possible experimental scheme. To show this nondestructive imaging manner could be realized by experiment we thus carry out theoretical simulations on a broad range of cold atoms, from those in a magneto-optical trap (MOT) to extremely dense clouds close to Bose-Einstein condensation (BEC). I will describe the numerical methods and experimental parameters used in the simulations. Finally, I will discuss the simulation results on some specific cases on the cold atomic samples. This analysis also presents some merits benefitted from the way I present in this thesis. More importantly, from our simulation data, it shows the proposed nondestructive imaging method could be experimentally realized. I will describe these in details and its possible applications too.