Enabling random lasing in an ultrabroad spectral range with robust platforms based on amorphous media

Random lasing with coherent feedback has been achieved in an ultrabroad spectral range of 533-870 nm when employing robust platforms based on amorphous media to provide optical feedback and modulating the gain curve. The pump threshold of the resultant random lasing is comparable to those reported with strongly scattering centers in crystalline forms and highly efficient microfiber systems. The findings suggest that amorphous media could serve as the base of robust platforms to investigate light-matter interactions in complex media and to create highly efficient light-emitting devices.