The coherent interaction between ultrashort light pulses and solid phase of matter have generated a broad spectrum of quantum phenomena ranging from Higgs mode in superconductors to light-induced topological order. I will show an example where intense far-infrared pulses coherently couple with the surface Dirac fermions of a topological insulator which hybridize into the so-called Floquet-Bloch states. The polarization of the light is a very effective knob to manipulate such a state and can transform the metallic surface into a Chern insulator. I will demonstrate angle-resolved photoemission spectroscopy as a direct probe to take snapshots of the instantaneous band structure of such an exotic state. I will also introduce scanning SQUID microscopy as a complementary magnetic imaging tool to sensitively detect superconductivity, magnetism and edge current, which may all be induced by light.