Fabrication of controlled volume scattering medium in poly (methyl methacrylate) by focused femtosecond laser pulses

摘要

A volume scattering medium was fabricated in a transparent material by focused femtosecond laser pulses. A random distribution of voids fabricated by femotosecond pulsed laser light acted as a volume scattering medium that may be applied to photonic secure data storage. We fabricated a partially random distribution of voids in poly(methyl methacrylate) and then measured the scattering properties. Comparing beam widths of the output intensity distribution through the scattering medium, obtained from both complex amplitude propagation and Monte Carlo simulation, showed that the scattering coefficient can be controlled by the void density.