▎ 摘　　要

NOVELTY - The LED has a semiconductor stack (30) which is provided with p-type and n-type semiconductor layers (25,29) and an active layer (27). An electrode (60) is positioned on the semiconductor stack. A graphene-metamaterial laminate structure (70) is formed between the electrode and the semiconductor stack. The graphene-metamaterial laminate structure is provided with a greater width than the electrode. The n-type compound semiconductor layer is provided with an n-type gallium nitride layer. The metamaterial comprises gold (Au) or a dielectric material. USE - LED. ADVANTAGE - Since the graphene-metamaterial laminate structure surrounds the electrode, the light traveling along the surface of the graphene-metamaterial laminate structure can be prevented from being absorbed by the electrode. Thus the optical loss can be reduced and the luminous efficacy can be improved by reducing the reflection of light into the semiconductor stack effectively. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the LED. P-type and n-type semiconductor layers (25,29) Active layer (27) Semiconductor stack (30) Electrode (60) Graphene-metamaterial laminate structure (70)