Broadly tunable deep blue laser based on a star-shaped oligofluorene truxene

Yue Wang, Georgios Tsiminis, Ying Yang, Arvydas Ruseckas, Alexander L. Kanibolotsky, Igor F. Perepichka, Peter Skabara, Graham A. Turnbull, Ifor D. W. Samuel

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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/cm(2) 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/cm(2). This is the broadest tuning range (51 nm) reported for organic deep-blue/blue lasing materials.

Original languageEnglish
Pages (from-to)1397-1400
Number of pages4
JournalSynthetic Metals
Issue number13-14
Publication statusPublished - Jul 2010


  • lasers
  • oligofluorene truxene
  • amplified spontaneous emission


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