light modulation element optical device including the light modulation element and electrical device including the optical device

摘要

The optical modulation device according to an embodiment is provided on a substrate, a first lower DBR layer on which two material layers having different refractive indices are repeatedly stacked alternately and on the first lower DBR layer, provided on the substrate, and The two different material layers are repeatedly stacked alternately and formed, a second lower DBR layer having an area smaller than that of the first lower DBR layer, provided on the second lower DBR layer, and a multi-quantum well structure An active layer including a semiconductor material having a refractive index that varies according to an applied voltage, and an upper DBR layer provided on the active layer and in which two material layers having different refractive indices are repeatedly stacked alternately. The reflectance of the optical modulation device may be increased by the first lower DBR layer, and accordingly, the optical modulation efficiency of the optical modulation device may be increased.