DEVICE AND METHOD FOR CONTROLLING THE DIRECTION OF BEAM DISTRIBUTION Russian patent published in 2019 - IPC G02B26/10 

FIELD: physics.

SUBSTANCE: use: to control the direction of propagation of laser radiation. Essence of the invention lies in the fact that the device for controlling the direction of propagation of laser radiation contains: substrate made of a material that transmits at least a range of wavelengths of laser radiation incident on said device and to be deflected; and meta-surface located on one side of the substrate, while the above-mentioned meta-surface contains: the first contacts located on the same side of the substrate, the first contacts being made of an electrically conductive material that transmits at least the wavelength range of said laser radiation; plurality of nanoantennas arranged in the form of an array, each of which contains at least one nanoresonator, made with the possibility of a controlled deflection of said laser radiation, with nanoresonators located on the first contacts, while each of nanoresonators (at least one) is a semiconductor p-i-n heterostructure having a low absorption property for at least the wavelength range of said laser radiation, moreover, the layers of the p-region, i-region and n-region of the semiconductor p-i-n heterostructure are parallel to the substrate; second pins located on nanoresonators, with the second contacts made of electrically conductive material that transmits at least the wavelength range of said laser radiation, while each of the voltages applied to the corresponding nanoresonator through the said contacts causes a change in resonant properties in the corresponding nanoresonator due to carrier injection in the nanoresonator under the action of the applied voltage, which leads to a phase shift of the wave of the aforementioned laser radiation in the corresponding nanoresonator, to which the voltage is applied, while the voltages are chosen so that phase shifts in nanoresonators form phase gradients located in the same plane, and laser radiation is deflected in accordance with the phase gradients formed.

EFFECT: technical result: providing the possibility of increasing the diffraction efficiency, operation in the transmission mode, short switching time, small size of the device.

19 cl, 11 dwg