OPTICAL ELEMENT, LIGHTING DEVICE, AND IMAGE DISPLAY DEVICE

摘要

Provided are an optical element, a lighting device, and an image display device, with which the absorption efficiency and the luminance of the excitation light can be improved. This optical element (40) is equipped with: a light-emitting layer (103) that generates excitation light; a plasmon excitation layer (105) stacked on the light-emitting layer (103) and having a higher plasma frequency than the light-emitting frequency of the light-emitting layer (103); an emission layer (207) that emits light by converting the surface plasmons or the light generated at the upper surface of the plasmon excitation layer (105) to light having a predetermined emission angle; and a metal layer (102) stacked on the underside of the light-emitting layer (103).

主权项

1. An optical element comprising:
a light-emitting layer generating an exciton; a plasmon excitation layer stacked on an upper side of the light-emitting layer and having a plasma frequency higher than a light emission frequency of the light-emitting layer; an emission layer converting light or a surface plasmon generated on an upper surface of the plasmon excitation layer to light having a predetermined emission angle and emitting the light; and a metal layer stacked on an underside of the light-emitting layer.