LIGHT EMITTING ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY DEVICE

摘要

A light source layer (4) has a substrate (10), and a pair of layers consisting of a hole-transport layer (11) and an electron-transport layer (13) which are provided on the substrate (10). A directionality control layer (5) has a plasmon excitation layer (15) that is laminated on the opposite side of the light source layer (4) to the substrate (10) side thereofand that has a plasma frequency higher than the frequency of light emitted from the light source layer (4), and a wave vector conversion layer (17) which is laminated on the plasmon excitation layer (15) and which converts light introduced from the plasmon excitation layer (15) so as to emit the light at a predetermined output angle. The plasmon excitation layer (15) is sandwiched between a low-permittivity layer (14) and a high-permittivity layer (16).