| abstract |
An edge-emitting type light-emitting device ( 11000, 14000 ) comprises an organic light-emitting layer ( 40 ), a pair of electrode layers ( 30 ) and ( 50 ) for applying an electric field to the organic light-emitting layer ( 40 ), and an optical waveguide which transmits light emitted from the organic light-emitting layer ( 40 ) to the edge. The optical waveguide comprises a core layer ( 20 ) mainly transmitting light, and cladding layers ( 10 ) and ( 60 ) having a refractive index lower than that of the ecore layer ( 20 ). The core layer ( 20 ) may be a layer different from the organic light-emitting layer ( 40 ) or may comprise the organic light-emitting layer. A grating ( 12 ) is formed in the core layer ( 20 ) or in the boundary area between the core layer ( 20 ) and the cladding layer ( 10 ). A light-emitting device ( 31000 ) may comprise an optical fiber section ( 200 ). Another embodiment ( 43000 ) may comprise a defect and a grating having a one-dimensional periodic refractive index distribution and constituting a photonic band gap. |