title: Image cloning beyond diffraction based on coherent population trapping in a hot rubidium vapor.
abstract: Following recent theoretical predictions, we report on an experimental realization of image cloning beyond usual diffraction, through the coherent population trapping (CPT) effect in a hot rubidium vapor. In our experiment, an alphabet letter image was transferred from a coupling field to a probe field, based on the CPT effect. Furthermore, we demonstrate that the cloned probe field carrying the image is transmitted without the usual diffraction. To our best knowledge, this is the first experimental report about image cloning beyond diffraction. We believe this mechanism, based on CPT, has definite and important applications in image metrology, image processing, and biomedical imaging.
authors.forename: Dong-Sheng
authors.initials: DS
authors.lastname: Ding
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Zhou
authors.forename: Bao-Sen
authors.initials: BS
authors.lastname: Shi