Lasing from an organic polymer is demonstrated in a device utilizing a distributed feedback (DFB) grating, manufactured by microcontact molding of CdSe nanocrystals (NCs) directly on top of the emitter layer. Besides the simpler fabrication in comparison with a reference device based on a photolithographically prepared DFB grating in a bottom dielectric layer, a much higher DFB strength for NC-gratings is observed, resulting in reduced lasing threshold and a fourfold differential lasing efficiency.
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Hermann et al. (2014) studied this question.
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