Red and green plasmonic-induced random laser in two-dimensional square array onto glass substrate

Red and green lasers are preferred with a multi-layered 2D structure onto a curved glass substrate (clock glass), a charge-coupled camera device (CCD) as a seal, and a gold nanostructure with rhodamine dye. For this purpose, a layer of Kapton tape was attached to the CCD by applying pressure to get a two-dimensional structure and transfer onto the glass, then the gold nanostructure was covered inside that glass substance. To achieve random laser beams of multiple wavelengths, this two-sided curved glass substrate was coated with rhodamine dye. The sample was pumped by a nanosecond green laser. Lasers from band-edge lattice plasmons were collected into arrays of plasmonic nanorods in a homogeneous environment by a spectrophotometer. Our results revealed emission peaks for red and green wavelengths with the lowest value of the laser threshold.