| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1442622 | Synthetic Metals | 2010 | 4 Pages |
Abstract
We report amplified spontaneous emission (ASE) and optically pumped deep-blue-emitting distributed feedback (DFB) lasers based on a star-shaped oligofluorene truxene molecule. A low ASE threshold of 2.1 kW/cm2 at 439 nm was achieved. The material exhibits a high net gain of 38 cm−1 and also low optical loss coefficient of 3.5 cm−1. Second-order DFB lasers show tuning of the emission wavelength from 422 to 473 nm, and a minimum threshold density of 515 W/cm2. This is the broadest tuning range (51 nm) reported for organic deep-blue/blue lasing materials.
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Authors
Yue Wang, Georgios Tsiminis, Ying Yang, Arvydas Ruseckas, Alexander L. Kanibolotsky, Igor F. Perepichka, Peter J. Skabara, Graham A. Turnbull, Ifor D.W. Samuel,