By Femtum
A repeatable manufacturing process of on-surface waveguide inscription at scale has been demonstrated with Femtum lasers. Polymers are cheap, bio-compatible materials and now there is a method to turn almost any plastic into a high-tech sensing device by directly writing waveguides at their surfaces. This process requires a match between a laser wavelength and a material’s absorption band in order to change the refractive index at the surface of the material, without causing additional deformation or burning of the matrix. Figure: On-surface waveguides in PMMA.
