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Broadband, Single wavelength, Continuous Spectral Control in a Polymer-Based Solid-State Random Laser

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posted on 2023-08-17, 16:00 authored by Bhupesh Kumar, Sebastian Schulz, Patrick Sebbah
In this paper, we present a study on partially pumped, single wavelength random lasing with tunability controlled by temperature in a solid-state random laser based on DCM (4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran) doped PMMA (polymethyl methacrylate) dye. By carefully shaping the spatial profile of the pump, we achieve low-threshold, single-mode random lasing with excellent rejection of side lobes. Notably, we observe that varying the temperature induces changes in the refractive index of the PMMA-DCM layer, resulting in a blue-shift of the lasing wavelength. Moreover, we demonstrate continuous tunability of the lasing wavelength over an impressive bandwidth of 8 nm.



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