Abstract
A novel and simple atomic mirror composed of a blue-detunedsemi-Gaussian beam is proposed. From the Fresnel diffraction theory, theintensity distributions of a collimated Gaussian laser beam diffractedby the straight edge of a semi-infinite opaque plate are studied. Theoptical potential of the semi-Gaussian beam for 85Rb atoms and itsspontaneous emission probability are calculated and compared with theperformance of the evanescent-wave mirror. Our study shows that theblue-detuned semi-Gaussian beam, as a novel atomic mirror, can be usedto reflect atomic beam efficiently, and under the same beam parametersand lower normal atomic velocity, the performance of thesemi-Gaussian-beam mirror is better than that of the evanescent-wave mirror.
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