Light emitting polymers in two dimensional plasmonic multi wavelength random laser
S. F. Haddawi, A.K. Kodeary, N.S. Shnan, Hammad R. Humud, S. M. Hamidi
Red, Green and Blue Multi wavelength lasing is desired in two dimensional flexible plasmonic multi-layer structure based on light emitting polymers and gold nanostructure. For this purpose, gold nano-structure is covered by three different light emitting polymers with poly-vinyl-pyrolydone as spacer layers. To achieve multi-wavelengths random laser, these six layers are coated over the poly-dimethyl siloxane substrate by main surface roughness and the sample is pumped by nanosecond green laser. The lasing due to band-edge lattice plasmons in arrays of plasmonic nano rods in a homogeneous environment is collected by spectrometer. Our results show emission peaks for every wavelength region with the minimum value of threshold lasing and the maximum of emission intensity.