Ink-Jet-Printed Organic Semiconductor Distributed Feedback Laser
X. Liu, S. Klinkhammer, K. Sudau, N. Mechau, C. Vannahme, J. Kaschke, T. Mappes, M. Wegener, and U. Lemmer
Appl. Phys. Express 5, 072101 (2012)
- Date: 19.06.2012
Ink-jet-printed organic distributed feedback (DFB) lasers are realized by employing light-emitting copolymer and suitable organic solvents to meet the demands of printability and optical amplification in a nanopatterned conjugated polymer slab waveguide. We demonstrate the accurate lateral positioning of ink-jet-printed patches of the gain material on a polymer substrate with 500×500 µm2 grating areas. We also printed patches of large lateral dimension of 6 mm2 on a silica grating. The high uniformity of the film thickness leads to a laser wavelength variation of less than 3 nm over the whole area.