The implementation of Fermi Hubbard model with ultracold atoms on optical lattices provide a fascinating playground to investigate both equilibrium and non-equilibrium physics of strongly interacting many body systems. In this talk we will show that production of double occupancies by optical lattice modulation can provide us with vital information about the equilibrium state. In the Mott insulating state it can measure the Mott gap, while in the antiferromagnetically ordered state, it encodes the nature of single particle excitations and can be used to detect presence of magnetic order. The subsequent decay of these high energy excitations (double occupancies) provide a unique window into non-equilibrium dynamics of this strongly interacting system.