Integrated optical beam steering device using switchable nanoantennas and a reflective metalens

Abstract

In this paper, an integrated optical device is proposed in which a reflective meta-lens and five switchable nano-antennas are combined to provide optical beam steering at the standard telecommunication wavelength of 1550 nm. For this purpose, a graphene-based switchable power divider is designed and integrated with nano-antennas to control the flow of the light entering the device. To achieve a higher angular accuracy in the radiated beams, a new algorithm is proposed and utilized to optimize the location of feeding nano-antennas in accordance with the reflective meta-lens. In order to achieve a minimum fluctuation in the light intensity when the beams are rotated in the space, an algorithm is developed to select optimum unit cells for the engineered meta-lens. The whole device is numerically analyzed using Electromagnetic full-wave simulations illustrating an optical beam steering with high accuracy (better than 1 degree) in the beam direction, and a low variation (less than 1 dB) in the radiated light intensity. The proposed integrated device can be used for many applications such as inter- and intra-chip optical interconnects, optical wireless communication systems, and advanced integrated LIDARs.

Beam-steering of Dielectric Flat Lens Nanoantenna with Elliptical Patch based on Antenna Displacement for Optical Wireless Applications

“…The beam is guided in the phased array antenna by predicting the proper feeding phases of the 64 elements using a deep neural network (DNN) with or without a lens. In [37], re ective meta-lens and ve switchable NAs are coupled in an integrated optical system to offer optical beam steering at the conventional telecommunication wavelength of 1550 nm.…”

Beam-steering of dielectric flat lens nanoantenna with elliptical patch based on antenna displacement for optical wireless applications

“…In Ref. 38 , reflective meta-lens and five switchable NAs are coupled in an integrated optical system to offer optical beam steering at the conventional telecommunication wavelength of 1550 nm. In Ref.…”