As an example of non-equilibrium colloidal assembly, we investigated optical matter (OM). OM is a form of matter in which nanoparticles self-organize through light matter interactions, referred to as optical bonds, resulting in periodical arrangements. These optical bonds originate from multiple scattering interactions between colloidal particles. As a consequence, OMs can be engineered and reconfigured "on-fly" by modifying the input light properties (wavelength, polarization, intensity profile,…). Many examples of optical matter have been created in the literature, such as dumbbell-shaped assemblies in gold particles, chain-like structures in silver particles, and hexagonal clusters in polystyrene particles. However, detailed information on the structure and/or their properties is often missing, particularly when the density of particle increases, or the size of particle is decreased. However, decreasing the size of particle in OM is crucial as particle smaller than 100 nm are required to use the Rayleigh scattering criteria which ease the comparison between theory and experiment. Moreover, metamaterials usually require the size of the nanoparticles to be ~1/5 of the wavelength which yields around (100-200) nm for the visible and NIR light spectrum range. OMs structures are therefore perfect candidates to demonstrate FRAME.