An electromagnetic logic metastructure realizing half addition and half subtraction operations based on a virtual polarizer

An electromagnetic logic metastructure (ELM) based on the virtual polarizer, capable of realizing half addition and half subtraction operations, is presented in this work. A virtual polarizer can control the polarization state of electromagnetic waves by coherent perfect absorption. Electromagnetic waves display their distinctive propagation characteristics in diverse polarization directions through the utilization of anisotropic materials such as liquid crystal and plasma, enabling the ELM to fulfill the function of the virtual polarizer. Through changing the physical quantities regarded as inputs, a transmission peak or an absorption peak is formed in different polarization directions when the logical relation is met. The parallel solution of the AND logic and XOR logic operations is realized, and the function of half addition and half subtraction is achieved. The axial ratio proves that the calculation results can be quickly solved by observing the different polarization states of the waves. The ELM, based on the virtual polarizer, processes data faster and more accurately than traditional logic devices. Half addition and half subtraction operations realized based on different electromagnetic polarizations offer a novel approach to control the propagation of electromagnetic waves. It might have significant implications for the application of liquid crystal and other anisotropic materials.