Abstract: Provided is a metaoptic configured to modulate incident light in a wavelength band, the metaoptic including a plurality of meta units respectively including a first semiconductor layer, an active layer provided on the first semiconductor layer, the active layer having a multiple quantum well structure and a refractive index variable based on a voltage applied thereto, and a second semiconductor layer provided on the active layer and doped with a polarity opposite to a polarity of the first semiconductor layer, wherein at least one of the plurality of meta units includes a plurality of first elements having a cylindrical shape and periodically provided spaced apart from each other in a first direction, and a plurality of second elements connecting the plurality of first elements to each other, and wherein the plurality of meta units are provided in a second direction that is perpendicular to the first direction.

Abstract: A light modulating device for modulating incident light in a given wavelength band is provided. The light modulating device may include: a first semiconductor layer; an active layer provided on the first semiconductor layer and having a multiple quantum well structure and a refractive index that is variable according to an electric field applied thereto, and a second semiconductor layer provided on the active layer and including a grating pattern in which a plurality of gratings extending in a first direction are repeatedly arranged in a second direction perpendicular to the first direction. The light modulating device may have high modulation efficiency owing to guided mode resonance by the grating pattern.

Abstract: An optical modulation device includes a plasmonic nano-antenna layer, a metal layer that faces the plasmonic nano-antenna layer, and a permittivity variation layer and a dielectric material layer between the plasmonic nano-antenna layer and the metal layer. An active area formed in the permittivity variation layer according to an external signal may function as a gate that controls optical modulation performance.

Abstract: An optical modulation device includes a plasmonic nano-antenna layer, a metal layer that faces the plasmonic nano-antenna layer, and a permittivity variation layer and a dielectric material layer between the plasmonic nano-antenna layer and the metal layer. An active area formed in the permittivity variation layer according to an external signal may function as a gate that controls optical modulation performance.