Elimination, reversal, and directional bias of optical diffraction

Details Elimination, reversal, and directional bias of optical diffraction Elimination, reversal, and directional bias of optical diffraction

2009-06-18

arxiv.org/abs/0906.3366v1

Physics

Quantum Physics

Scientific paper

We experimentally demonstrate the manipulation of optical diffraction, utilizing the atomic thermal motion in a hot vapor medium of electromagnetically-induced transparency (EIT). By properly tuning the EIT parameters, the refraction induced by the atomic motion may completely counterbalance the paraxial free-space diffraction and by that eliminates the effect of diffraction for arbitrary images. By further manipulation, the diffraction can be doubled, biased asymmetrically to induced deflection, or even reversed. The latter allows an experimental implementation of an analogy to a negative-index lens.

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