Inkjet-printed vertically emitting solid-state organic lasers

Abstract : In this paper, we show that Inkjet Printing can be successfully applied to external-cavity vertically-emitting thin-film organic lasers, and can be used to generate a diffraction-limited output beam with an output energy as high as 33.6 µJ with a slope efficiency S of 34%. Laser emission shows to be continuously tunable from 570 to 670 nm using an intracavity polymer-based Fabry-Perot etalon. High-optical quality films with several µm thicknesses are realized thanks to ink-jet printing. We introduce a new optical material where EMD6415 commercial ink constitutes the optical host matrix and exhibits a refractive index of 1.5 and an absorption coefficient of 0.66 cm-1 at 550-680 nm. Standard laser dyes like Pyromethene 597 and Rhodamine 640 are incorporated in solution to the EMD6415 ink. Such large size " printed pixels " of 50 mm 2 present uniform and flat surfaces, with roughness measured as low as 1.5 nm in different locations of a 50µm x 50µm AFM scan. Finally, as the gain capsules fabricated by Inkjet printing are simple and do not incorporate any tuning or cavity element, they are simple to make, have a negligible fabrication cost and can be used as fully disposable items. This works opens the way towards the fabrication of really low-cost tunable visible lasers with an affordable technology that has the potential to be widely disseminated.
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Submitted on : Tuesday, May 24, 2016 - 12:16:29 PM
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Oussama Mhibik, Sébastien Chénais, Sébastien Forget, Christophe Defranoux, Sébastien Sanaur. Inkjet-printed vertically emitting solid-state organic lasers. Journal of Applied Physics, American Institute of Physics, 2016, 119, pp.173101. ⟨10.1063/1.4946826⟩. ⟨hal-01320705⟩

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