  We present the first experimental demonstration of a new type of bound states
in the continuum, namely, compacton-like linear states in flat bands lattices.
To this end, photonic Lieb lattices are employed, which exhibit three
tight-binding bands, with one being perfectly flat. Our results could be of
great importance for fundamental physics as well as for various applications
concerning imaging and data transmission.

Optics;Mesoscale and Nanoscale Physics