A logic metastructure for register function implementation

Abstract

A coherent perfect absorption-based logic metastructure (LM) capable of register functionality is presented in the work. The unique one-dimensional layered architecture enables dual electromagnetic wave selectivity in both frequency and spatial angle domains within specific spectral ranges. The structure contains graphene layers as the tunable dielectric for the LM. By controlling the chemical potential of graphene, the incidence angle, and the phase difference of the coherent light, the coherent absorptivity of the LM can be changed accordingly. By establishing logic-level definitions for input/output signals, two distinct operational conditions that define logical relationships between inputs and outputs are derived. Under these dual operational modes, the LM achieves data registration across eight discrete addresses. The system employs clock signal synchronization to correlate outputs from both states with one serving as a block register that identifies the data block location and the other functioning as a data register outputting actual content. The combined output from both registers generates the complete physical address of stored data. This architectural design enables simultaneous 128-bit data registration (8 × 2 × 8), demonstrating the potential for high-density optical information processing applications.