Graphene‐Based Terahertz Perfect Absorber with Broadband, Wide‐Angle, and Dynamically Tunable Performance

This work introduces a dynamically adjustable terahertz metasurface absorber, utilizing an innovative graphene pattern designed with scalable geometric proportions. The absorber is designed following a scaling principle, wherein the key dimensions of the top‐layer graphene pattern are proportionally scaled, thereby simplifying the design process and optimizing performance. Measured within the frequency range from 1.96 to 5.42 THz, the absorber demonstrates outstanding performance, achieving an average efficiency of 96.13% with values consistently above 90%, which equates to a 3.46 THz bandwidth. Perfect absorption is observed at three specific frequencies: 2.22, 3.27, and 5.06 THz. The broadband absorption are…