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 E-Mail IMAGE: A scattering-invariant mode of light is generated by sending a laser beam onto a judiciously configured spatial light modulator (see quadratic pixel array on the left). This modulated beam then. view more  Credit: Allard Mosk/Matthias Kühmayer Why is sugar not transparent? Because light that penetrates a piece of sugar is scattered, altered and deflected in a highly complicated way. However, as a research team from TU Wien (Vienna) and Utrecht University (Netherlands) has now been able to show, there is a class of very special light waves for which this does not apply: for any specific disordered medium such as the sugar cube you may just have put in your coffee tailor-made light beams can be constructed that are practically not changed by this medium, but only attenuated. The light beam penetrates the medium, and a light pattern arrives on the other side that has the same shape as if the medium were not there at all.

Wiedner hauptstraStefan rotterJeroen boschAllard moskUtrecht university netherlandsInstitute of theoretical physicsInstitute for theoretical physicsAllard mosk at utrecht universityUtrecht universityTheoretical physicsBig dipperNature photonicsChemistry physics materials sciencesஸ்டீபன் ரோட்டார்அலார்ட் மசூதிஅட்ரெக்ட் பல்கலைக்கழகம் நெதர்லாந்து