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Lasing from Epitaxially Oriented Needle Crystals of a Thiophene/Phenylene Co‐Oligomer
Author(s) -
Mizuno Hitoshi,
Ohnishi Itaru,
Yanagi Hisao,
Sasaki Fumio,
Hotta Shu
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201104182
Subject(s) - materials science , lasing threshold , oligomer , thiophene , phenylene , epitaxy , substrate (aquarium) , optoelectronics , laser , photochemistry , optics , polymer chemistry , polymer , nanotechnology , composite material , organic chemistry , wavelength , chemistry , oceanography , physics , layer (electronics) , geology
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.