Metaoptics and electronic apparatuses including the same

A metaoptic for modulating incident light in a wavelength band, the metaoptic comprising:

• a dielectric layer;
• and
• a plurality of first meta units having a cylindrical shape, the plurality of first meta units being periodically provided on the dielectric layer and spaced apart from each other in a first direction and a second direction perpendicular to the first direction,
• wherein each of the plurality of first meta units comprises:
• 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 voltages are independently applied to the plurality of first meta units,
• wherein the plurality of first meta units are configured to two-dimensionally steer the incident light, and
• wherein a thickness of at least one of the plurality of first meta units is less than a center wavelength of the wavelength band.

A metaoptic for modulating incident light in a predetermined wavelength band, the metaoptic comprising:

• 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 plurality of second semiconductor layers provided on the active layer and doped with a polarity opposite to a polarity of the first semiconductor layer, the plurality of second semiconductor layers being periodically spaced apart from each other in a first direction and extending in a second direction perpendicular to the first direction,
• wherein a grating pattern is formed by a pattern in which the active layer and the plurality of second semiconductor layers repeat in the first direction, and
• wherein, in the wavelength band, the metaoptic has a reflectance that is greater than or equal to 50%, and a maximum phase shift by the metaoptic based on wavelength variations is greater than or equal to π rad, or
• the metaoptic has a reflectance that is greater than or equal to 50% or more in a refractive index variation region for light having a wavelength in the wavelength band, and a maximum phase shift by the metaoptic based on refractive index variations is greater than or equal to π rad.