Hitoshi Mizuno, Itaru Ohnishi, Hisao Yanagi, Fumio Sasaki and Shu Hotta Lasing from Epitaxially Oriented Needle Crystals of a Thiophene/Phenylene Co-Oligomer Advanced Materials 24
Optically pumped lasing of epitaxially oriented molecular crystals is presented. Needle-like crystals of a thiophene/phenylene co-oligomer is grown along the  direction of a KCl substrate. The fluorescence light is one-dimensionally confined and amplified by the self-waveguiding effect in the elongated needles. The Fabry-Pérot resonation by the terminated ends results in laser oscillations corresponding to the needle length.
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