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Low-threshold organic laser based on an oligofluorene truxene with low optical losses

Tsiminis, Georgios and Wang, Yu and Shaw, Paul E. and Kanibolotsky, A.L. and Perepichka, I.F. and Dawson, M.D. and Skabara, P.J. and Turnbull, Graham A. and Samuel, Ifor D. W. (2009) Low-threshold organic laser based on an oligofluorene truxene with low optical losses. Applied Physics Letters, 94 (24). 243304 -1-243304 -3. ISSN 0003-6951

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Abstract

A blue-emitting distributed feedback laser based on a star-shaped oligofluorene truxene molecule is presented. The gain, loss, refractive index, and (lack of) anisotropy are measured by amplified spontaneous emission and variable-angle ellipsometry. The waveguide losses are very low for an organic semiconductor gain medium, particularly for a neat film. The results suggest that truxenes are promising for reducing loss, a key parameter in the operation of organic semiconductor lasers. Distributed feedback lasers fabricated from solution by spin-coating show a low lasing threshold of 270 W/cm(2) and broad tunability across 25 nm in the blue part of the spectrum.

Item type: Article
ID code: 19103
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: distributed feedback lasers, ellipsometry, laser tuning, optical losses, optical waveguides, organic semiconductors, refractive index, semiconductor lasers, spin coating, superradiance, Physics, Physics and Astronomy (miscellaneous)
Subjects: Science > Physics
Department: Faculty of Science > Pure and Applied Chemistry
Faculty of Science > Institute of Photonics
Depositing user: Strathprints Administrator
Date Deposited: 18 May 2010 13:46
Last modified: 15 Apr 2015 17:45
URI: http://strathprints.strath.ac.uk/id/eprint/19103

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