An investigation into random lasing from thin film on a sandpaper substrate

The blender of active material R6G and film forming agent PDMS are spincoated onto a sandpaper substrate to fabricate the random laser of thin layer. The sandpaper provides support for the random laser and the sand particles on the sandpaper substrate provide the scattering mechanism of random lasing output. The random lasing emission centres at 560 nm, with a threshold of about 13 mJ/cm 2 . This design provides a new and cheap method to fabricate random lasers. Graphical abstract