Patent ID: 9638941
Date: 2017-05-02
CPC Classifications: B82Y,G01S,G02F,H04N

Claim:
1. A photonic crystal type light modulator comprising: a substrate; a first electrode disposed on the substrate and formed of a transparent conductive material; an active layer disposed on the first electrode, wherein a refractive index of the active layer changes according to application of an electric field, the active layer being directly in contact with the first electrode; a second electrode disposed on the active layer, the second electrode being directly in contact with the active layer and formed of a transparent conductive material; and a photonic crystal layer disposed on the second electrode, the photonic crystal layer comprising a two-dimensional (2D) grating that has a periodic arrangement of a refractive index, wherein a transmission wavelength band of the photonic crystal layer changes based on an electric field formed in the active layer by electric voltage applied between the first electrode and the second electrode.