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Flexible blue-emitting encapsulated organic semiconductor DFB laser

Herrnsdorf, Johannes and Guilhabert, Benoit Jack Eloi and Chen, Y. and Kanibolotsky, Alexander and Mackintosh, Allan and Pethrick, Richard and Skabara, Peter and Gu, Erdan and Laurand, Nicolas and Dawson, Martin (2010) Flexible blue-emitting encapsulated organic semiconductor DFB laser. Optics Express, 18 (25). pp. 25535-25545. ISSN 1094-4087

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Mechanically flexible distributed feedback (DFB) lasers are fabricated by a low-cost approach using soft-lithography from a holographic master grating. The gain material is a star-shaped oligofluorene providing laser emission from 425 to 442 nm with a soft pump threshold at 14.4 μJ/cm2 (2.7 kW/cm2). Encapsulation of the devices enables stable operation in ambient atmosphere at a 1/e degradation energy dosage of 53 J/cm2.