Work

Tunable electromagnetically induced transparency and polarization frequency switches in photosensitive silicon-VO2-graphene metamaterial

Year: 2025

Type: article

Abstract: This work presents a hybrid metamaterial platform integrating graphene, photosensitive silicon, and vanadium dioxide (VO 2 ) to achieve dynamically tunable electromagnetically induced transparency (EIT) and polarization-selective frequency switching in the terahertz (THz) regime. The unit cell comprises a graphene cruciform (GC) resonator and four quarter graphene rings resonator (QGRs), enabling precise control of the EIT window’s amplitude and frequency through Fermi level modulation. The EIT effect exhibits robust angular insensitivity (<70°), with a frequency modulation depth of 0.176 and amplitude modulation depth of 0.907. Leveraging the light-driven conductivity of photosensitive silicon and the insulator-to-metal phase transition of VO 2 , the structure dynamically switches between slow-light states and enables single-/dual-frequency polarization-selective transmission at 1.26 THz, 1.85 THz, and 1.14/1.79 THz, achieving a modulation depth up to 92 %. This tri-material synergy overcomes the rigidity of conventional single-component systems, offering a reconfigurable framework for THz communication and sensing devices.

Source: Results in Physics

DOI: 10.1016/j.rinp.2025.108418

Authors: Junjiao Lu, Xuejun Qiu, Yi Wang, Zhenzhou Cao, Jin Hou, Chengzhi Jin

Institutions: South Central Minzu University, State Ethnic Affairs Commission

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,920

Funders: National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities