Dual wavelength multiphoton absorption

Abstract

In this study, we report a new phenomenon of multiphoton polymerization induced by dual wavelength irradiation with femtosecond laser of 515 and 1030 nm. We demonstrated a spatial resolution of 1200 nm from a laser spot of 1020 nm diameter. This is a significant increase in the spatial resolution of about 33 and 58% than the two photon absorption (2PA) and the three photon absorption (3PA) processes, respectively. This increase is a direct result of the significant reduction in the "Blurry" effect that is caused by continuous photochemical reaction beyond the targeted area. This phenomenon may allow the fabrications of two-dimensional and three-dimensional components of very high resolution.