Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3149827
Keywords
distributed feedback lasers; high-speed optical techniques; laser tuning; optical pumping; organic semiconductors; polymers; semiconductor lasers; two-photon processes
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Funding
- EPSRC [EP/C542398/1, EP/C542401/1, EP/E062636/1, GR/75656/01]
- EPSRC [EP/C542398/1, EP/E062636/1, EP/C542401/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [GR/R75656/01, EP/C542398/1, EP/E062636/1, EP/C542401/1] Funding Source: researchfish
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A tunable two-photon pumped solid-state laser based on polyfluorene is reported. A detailed investigation of the two-photon absorption in polyfluorene for both nanosecond and femtosecond time regimes in solution, and solid-state allows the determination of the most favorable conditions for lasing. Tunable distributed feedback lasers are made by spin coating from a polyfluorene solution on corrugated silica substrates and lasing is achieved under two-photon excitation at 640 nm with an absorbed energy density at lasing threshold of 1.3 mJ/cm(2). These results highlight an alternative pumping scheme for blue organic semiconductor lasers.
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