Light modulating device and electronic apparatus including the same

A beam steering device comprising:

• a substrate;
• a phase modulating device comprising a plurality of phase modulation channels that are repeatedly on the substrate,
• wherein each of the plurality of phase modulation channels comprises:
• a variable mirror comprising a plurality of lattice structures provided in a horizontal direction, each of the plurality of lattice structures comprising a material having a refractive index that changes based on a temperature of the material,
• a distributed Bragg mirror spaced apart from the variable mirror in a vertical direction, the distributed Bragg mirror comprising a first material layer and a second material layer that are alternately stacked in the vertical direction, a refractive index of the first material layer being different from a refractive index of the second material layer;
• a spacer layer between the variable mirror and the distributed Bragg mirror, the spacer layer being provided between upper surfaces of the plurality of lattice structures and the distributed Bragg mirror;
• a heating portion between the substrate and the phase modulating device and on the variable mirror in the vertical direction opposite to the distributed Bragg mirror, the heating portion being supported by the substrate and configured to apply heat to each of the plurality of lattice structures;
• and
• at least one processor configured to control the heating portion.

An electronic apparatus comprising:

• a light source configured to emit light;
• a beam steering device configured to steer the light emitted from the light source towards an object, the beam steering device comprising:
• a substrate;
• a phase modulating device comprising a plurality of phase modulation channels that are repeatedly on the substrate,
• wherein each of the plurality of phase modulation channels comprises:
• a variable mirror comprising a plurality of lattice structures provided in a horizontal direction, each of the plurality of lattice structures comprising a material having a refractive index that changes based on a temperature of the material,
• a distributed Bragg mirror spaced apart from the variable mirror in a vertical direction, the distributed Bragg mirror comprising a first material layer and a second material layer that are alternately stacked in the vertical direction, a refractive index of the first material layer being different from a refractive index of the second material layer;
• a spacer layer between the variable mirror and the distributed Bragg mirror, the spacer layer being provided between upper surfaces of the plurality of lattice structures and the distributed Bragg mirror;
• a heating portion between the substrate and the phase modulating device and on the variable mirror in the vertical direction opposite to the distributed Bragg mirror, the heating portion being supported by the substrate and configured to apply heat to each of the plurality of lattice structures;
• and
• at least one processor configured to control the heating portion, a sensor configured to receive light from the object;
• and
• at least one other processor configured to analyze a location or a shape of the object based on a signal transmitted from the sensor.