title: Emission properties of printed organic semiconductor lasers.
abstract: 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 microJ/cm2. The results suggest that direct printing is a promising fabrication technique for optically confined integrated optoelectronics.
authors.affiliation: National Nanotechnology Laboratory of the Istituto Nazionale di Fisica della Materia, c/o Dipartimento di Ingegneria dell'Innovazione, Università di Lecce, via Arnesano, 1-73100 Lecce, Italy. dario.pisignano@unile.it
authors.forename: Dario
authors.initials: D
authors.lastname: Pisignano
authors.forename: Luana
authors.initials: L
authors.lastname: Persano
authors.forename: Elisa
authors.initials: E
authors.lastname: Mele
authors.forename: Paolo
authors.initials: P
authors.lastname: Visconti
authors.forename: Roberto
authors.initials: R
authors.lastname: Cingolani
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Gigli
authors.forename: Giovanna
authors.initials: G
authors.lastname: Barbarella
authors.forename: Laura
authors.initials: L
authors.lastname: Favaretto