Optical modulator and optical modulator array

A light modulator comprising:

• a base layer made of an insulating material having a transmitting property for object light being a modulation object and on which the object light is incident from a lower surface;
• a conductive pattern layer made of a conductive material, including a plurality of pattern portions arranged periodically in a first direction perpendicular to a thickness direction of the base layer, and formed on an upper surface of the base layer;
• a modulation layer made of an electro-optic polymer, configured to fill a space between the plurality of pattern portions and formed on an upper surface of the conductive pattern layer with a predetermined thickness, and having a refractive index to be changed by applying an electric field using the conductive pattern layer;
• and
• a reflection layer formed on an upper surface of the modulation layer and reflecting configured to reflect the object light being incident from the lower surface of the base layer and transmitted through the modulation layer toward the base layer, wherein
• the object light having a phase modulated by being transmitted through the modulation layer, and reflected by the reflection layer is output from the lower surface of the base layer to the outside as modulated light.