Random lasing from plasmonic thin film metamaterials

What is it about?

Periodically patterned sculptured plasmonic thin films offer an inventive landscape for light-matter interactions. Multiple light scattering, plasmonic resonances, anisotropy, Bragg scattering: a plethora of effects in these systems provide new possibilities to study these interactions. We realize an efficient and controllable random laser in dye infiltrated periodically patterned silver nanocolumns. Due to the periodic and anisotropic nature, the system possesses an asymmetric surface plasmon resonances. By varying the incidence angle and polarization, we selectively couple the pump light to the surface plasmon resonances of the film. Consequently, an enhanced and easily controllable random lasing is achieved in a periodically patterned silver columnar thin film metamaterials.

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