Laser beam steering device and system including the same

A laser beam steering device comprising a plurality of unit cells, each of the unit cells comprising:

• a refractive index change layer having a refractive index that changes based on a voltage of an electrical signal;
• at least one antenna pattern disposed above the refractive index change layer;
• a wavelength selection layer disposed under the refractive index change layer and having a carrier density that allows to react a resonance wavelength of a laser beam incident onto the laser beam steering device;
• and
• a unit cell driver configured to apply the voltage to the refractive index change layer to change the refractive index of the refractive index change layer,
• wherein the carrier density of the wavelength selection layer that reacts to the resonance wavelength of the laser beam is different from a carrier density of the refractive index change layer disposed between the at least one antenna pattern and the wavelength selection layer.

A system comprising:

• a laser light source configured to emit a laser beam to an object;
• a laser beam steering device configured to steer the laser beam emitted from the laser light source;
• and
• a detector configured to detect a laser beam returning from the object,
• wherein the laser beam steering device comprises a plurality of unit cells, each of the unit cells comprising:
• a refractive index change layer having a refractive index that changes based on a voltage of an electrical signal;
• at least one antenna pattern disposed above the refractive index change layer;
• a wavelength selection layer disposed under the refractive index change layer and having a carrier density that allows to react to a resonance wavelength of the laser beam;
• and
• a unit cell driving unit applying the voltage to the refractive index change layer to change the refractive index of the refractive index change layer,
• wherein the carrier density of the wavelength selection layer that reacts to the resonance wavelength of the laser beam is different from a carrier density of the refractive index change layer disposed between the at least one antenna pattern and the wavelength selection layer.

A laser beam steering device comprising:

• an insulation layer;
• an antenna pattern disposed on an upper surface of the insulation layer;
• a driver configured to generate an electrical signal;
• a first active layer and a second active layer which are disposed between a lower surface of the insulation layer and the driver;
• wherein:
• the first active layer is disposed closer to the insulation layer in comparison with the second active layer, has a carrier density higher than a carrier density of the second active layer, and changes a refractive index of the first active layer according to a voltage of the electrical signal;
• and
• the second active layer resonates at a wavelength of a laser beam which is input to the laser beam steering device.