We report on the realization of a compact distributed feedback laser using luminescent polymer films where the optical feedback is provided by Bragg diffraction on an index grating. Permanent modulation of the polymer refractive index is achieved using an original technique for photoinduced patterning of surface relief grating, using laser-controlled mass-transport in azoaromatic polymers. We describe the fabrication of such surface gratings and show the laser emission properties resulting from a transversal one-photon pumping of the sinusoidally modulated polymer films upcovered with a luminescent-dye-doped film. Control of the laser wavelength by the grating pitch is evidenced.

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Articles you may be interested inLong-range surface plasmon single-mode laser concepts J. Appl. Phys. 112, 063115 (2012); 10.1063/1.4754417 Wafer-scale fabrication of polymer distributed feedback lasers

The high photoluminescence quantum yield of phenylethynylene oligomers (see Figure for chemical formula) capped by different terminal groups, such as naphthyl or benzyl benzoates, coupled with their good solubility has led to their introduction as chromophores in a polymer matrix of poly(vinylcarbazole) for laser emission studies.

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