Electromagnetically Induced Self-Imaging in Four-Level Doppler Broadening Medium

We show the influences of temperature on the self-imaging in the coherent atomic system which consists of four-level ⁸⁷Rb atoms. The different-direction self-imaging, the corresponding imaging quality, and the imaging contrast ratio in this Doppler broadening medium are studied. As a result, the imaging-position linearly increases with the temperature, while the quality of the self-imaging does not show clear connection with the temperature. Due to the weaker mutual interference in the higher temperature, the contrast ratios in the two directions increase. The interesting results are important and may have potential applications in imaging storage and processing. (paper)