Graphene/MOFs heterostructure enabled by interfacial charge-dipole coupling for multidimensional terahertz thermal...

Area of Science:

• Materials Science
• Nanotechnology
• Optoelectronics

Background:

• Metasurfaces offer tunable electromagnetic responses.
• Graphene and Metal-Organic Frameworks (MOFs) possess unique electronic and structural properties.
• Terahertz (THz) wave applications require advanced modulation and sensing capabilities.

Purpose of the Study:

• To develop a graphene/MOF heterostructure integrated metasurface (MS@GrMOF) for multidimensional THz wave modulation.
• To investigate the device's performance for high-sensitivity thermal sensing.
• To explore the synergistic effects of graphene and MOFs in THz applications.

Main Methods:

• Fabrication of MS@GrMOF devices integrating monolayer graphene with MOFs.
• Characterization of THz wave modulation (amplitude, frequency, phase) under thermal induction.
• Application of Kramers-Kronig relation for phase modulation quantification.
• Sensitivity analysis for temperature sensing across different modulation dimensions.

Main Results:

• MS@GrMOF demonstrated enhanced multidimensional THz modulation compared to graphene-only metasurfaces.
• Significant resonance frequency shifts (up to 245 GHz) and amplitude variations were observed.
• High sensitivities were achieved: 0.39%/K (amplitude), 3.4 GHz/K (frequency), and 3.74°/K (phase).

Conclusions:

• The synergistic integration of graphene and MOFs provides a robust strategy for high-efficiency, multidimensional THz modulation.
• MS@GrMOF exhibits strong potential for reconfigurable THz devices and intelligent optoelectronic systems.
• The developed device is suitable for advanced, high-sensitivity thermal sensing applications.