Graphene Terahertz Devices for Sensing and Communication.

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology
• Terahertz Technology

Background:

• Graphene possesses unique optoelectronic properties suitable for terahertz (THz) applications.
• THz technology is crucial for advanced sensing and next-generation wireless communication.
• Existing THz devices require further development for enhanced performance and broader applications.

Purpose of the Study:

• To review recent advancements in graphene-based THz devices.
• To explore the dual applications of graphene in THz molecular sensing and wave modulation.
• To highlight the synergistic relationship between sensing and communication advancements.

Main Methods:

• Utilizing graphene's environment-sensitive THz transmission and emission for molecular adsorption detection.
• Employing graphene's absorption modulation capabilities when gated for THz wave modulation.
• Investigating novel device structures, spectroscopic systems, metasurfaces, spatial phase modulation, and polarization manipulation.

Main Results:

• Graphene enables high-sensitivity and selectivity in biomolecular sensing (e.g., DNA) and pesticide detection.
• Graphene demonstrates significant potential for THz wave modulation, crucial for wireless communication.
• Novel device architectures and modulation techniques have led to enhanced absorption and wave control.

Conclusions:

• Graphene-based THz devices offer versatile platforms for both sensitive molecular detection and efficient wave modulation.
• Advancements in THz sensing enhance biomolecular analysis and inform graphene communication applications.
• Developments in THz communication strategies improve sensing capabilities, creating a mutually beneficial relationship.