Journal
OPTICS EXPRESS
Volume 19, Issue 23, Pages 22443-22454Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.022443
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Funding
- Spanish Government (MEC)
- European Community [MAT2008-06648-C02]
- University of Alicante
- CSIC
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We report on the fabrication of efficient organic distributed feedback (DFB) lasers with thermally-nanoimprinted active films, emitting between 565 and 580 nm. The use of thermal-NIL has allowed, as opposed to room temperature or solvent-assisted techniques, high grating quality and excellent modulation depth. The 155 degrees C heat exposure of the NIL process, does not significantly affect the thermal and optical properties of the active material (polystyrene films doped with a perylenediimide derivative). These devices combine a simple and low-cost preparation method with good laser characteristics, i.e. thresholds of 1 mu J/pulse, single-mode emission with linewidths below 0.2 nm and photostability half-lives of similar to 10(5) pump pulses under ambient conditions. In comparison to more standard DFBs with gratings on the substrate, their fabrication is much easier, while they show a similar laser performance. (C) 2011 Optical Society of America
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