Two-Photon Polymerization, also known as two-photon or multi-photon lithography or direct laser writing, utilizes the basic physical effect of two-photon absorption. Two-photon absorption occurs when an atom or molecule absorbs two photons simultaneously, allowing it to be excited to a higher energy state.
Two-Photon Polymerization (2PP) is the highest precision additive manufacturing technology and enables high-resolution 3D printing of virtually any micro-, meso-, and macroscale structures with submicron features and unparalleled shape accuracy.