Quantum Geometric Photocurrents in Anisotropic Moiré Superlattices: Enabling High‐Dimensional Structured Light Recognition and Compact Computer Vision

Abstract Moiré superlattices in van der Waals heterostructures offer a novel approach to manipulating the Bloch wavefunction texture, influencing nonlinear electromagnetic responses like photocurrents. Twisted anisotropic ReS 2 , with its lower symmetry and inclusion of more independent non‐zero nonlinear conductivity tensor elements, emerges as a promising platform for exploring nonlinear photoresponses distinct from highly symmetric hexagonal lattices. This study systematically investigates several novel anisotropic moiré superlattices based on the twisted ReS 2 homojunctions using second harmonic generation (SHG) and nonlinear photoelectric response measurements. It is found that the texture patterns of these anisotropic moiré superlattices are highly dependent on the twist angle. Especially, the photocurrents exhibit sensitivity to both wavelength and incident direction excited by left‐ and right‐circularly polarized light. In addition, due to the chiral moiré interface and the contribution of the Berry curvature dipole (BCD), twisted ReS 2 homojunctions demonstrate an exceptional circular photogalvanic effect (CPGE) as well. By exploiting the unique photoresponse to polarization, image recognition using vortex beam within a single twisted ReS 2 device is achieved. This work not only underscores the potential of quantum geometry through anisotropic moiré superlattices but also provides valuable insights for the development of advanced intelligent optoelectronic devices.