Magnetoresponsive Discoidal Photonic Crystals Toward Active Color Pigments


  • Professor Yang passed away unexpectedly on 26 September, 2013; this work is dedicated to his memory



Photonic microdisks with a multilayered structure are designed from photocurable suspensions by step-by-step photolithography. In each step of photolithography, either a colloidal photonic crystal or a magnetic-particle-laden layer is stacked over the windows of a photomask. Sequential photolithography enables the creation of multilayered photonic microdisks that have brilliant structural colors that can be switched by an external magnetic field.