Lasing from epitaxially oriented needle crystals of a thiophene/phenylene co-oligomer.

Mizuno, Hitoshi; Ohnishi, Itaru; Yanagi, Hisao; Sasaki, Fumio; Hotta, Shu · Adv Mater · 2012

basic_science · Level V

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Abstract

Optically pumped lasing of epitaxially oriented molecular crystals is presented. Needle-like crystals of a thiophene/phenylene co-oligomer is grown along the [110] 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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