According to Stephen Hawking's theory, black holes should emit particles. But this radiation is too weak to be observed. To try and understand this phenomenon, two C2N researchers, Jacqueline Bloch and Sylvain Ravets, have built artificial black holes: microscopic structures called micro-cavities that, under certain conditions, emit "polaritons" with astonishing properties. These quantum particles form a fluid, which is essential for observing the famous Hawking effect*.
An episode in the series "Trous noirs de labo" by Le Blob media (Universciences)
*Le Blob youtube channel