We investigated the emission properties of a distributed-feedback resonator based on an organic semiconductor patterned by a novel printing technology. We observed the peak splitting of the photonic bandstructure of the periodic grating and extracted the effective refractive index of the outcoupled guided modes. The laser works at the second diffraction order, exhibiting narrow single-mode emission at 637 nm, with a threshold as low as 37 µJ/cm^2. The results suggest that direct printing is a promising fabrication technique for optically confined integrated optoelectronics.
© 2005 Optical Society of America
Dario Pisignano, Luana Persano, Elisa Mele, Paolo Visconti, Roberto Cingolani, Giuseppe Gigli, Giovanna Barbarella, and Laura Favaretto, "Emission properties of printed organic semiconductor lasers," Opt. Lett. 30, 260-262 (2005)