Design and Analysis of SiN Optical Waveguide for 2D Beam Steering of small angle

The purpose of this research is to address the issue of optical deflection angle in small magnetic devices, which can limit their effectiveness in various applications. To overcome this challenge, we propose using grating couplers to control the direction of light propagation. Specifically, we have developed a system that consists of 16 phase array grating couplers and 8 multimode interferometers (MMIs) that work together to achieve 2D beam steering. The researchers found that changing the wavelength by 50nm was enough to achieve 6.06° of 1D beam steering. By carefully manipulating the phase of the grating couplers, we were able to deflect the light from 0° to 1.75° of 2D beam steering, which could greatly enhance the performance of small magnetic devices.