The present invention provides a light emitting device typified by a laser
oscillator using an electroluminescent material that can enhance
directivity of emitted laser light and resistance to a physical impact. A
light emitting device includes a first electrode having a convex portion
or a concave portion, an electroluminescent layer formed over the first
electrode to overlap the convex portion or the concave portion, and a
second electrode having a convex portion or a concave portion formed over
the electroluminescent layer to overlap the convex portion or the concave
portion. In the light emitting device, the first electrode has a curved
surface in the convex portion or the concave portion, a center of a
curvature of the curved surface is located on an opposite side of the
second electrode, and laser light is emitted by oscillating light
generated in the electroluminescent layer between the first electrode and
the second electrode.