scientists had not converted light directly into matter and antimatter. The conversion of light into matter and antimatter is not a simple process and is not yet achievable using our current scientific knowledge and technology.
However, the concept of converting light into matter and antimatter is based on Einstein's famous equation E=mc^2, which describes the equivalence of energy (E) and mass (m) with the speed of light (c) as a constant. According to this equation, a sufficiently high amount of energy can theoretically be converted into mass, and vice versa.
In particle physics, matter and antimatter are created naturally in high-energy processes, such as those occurring in particle accelerators like the Large Hadron Collider (LHC). In these experiments, particles are accelerated to very high speeds and collide with each other. When the energy of the collision is high enough, it can lead to the production of new particles, including both matter and antimatter particles.
However, directly converting light (photons) into matter and antimatter would require extreme conditions and advanced technologies beyond our current capabilities. Scientists are constantly pushing the boundaries of our understanding of fundamental physics, but as of now, light-to-matter/antimatter conversion remains a theoretical concept and has not been practically achieved.