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Topological terahertz (THz) metadevices offer robust, low-loss waveguiding for advanced photonic circuits. These reconfigurable devices enable precise control of THz waves, crucial for 6G communications and sensing applications.

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Area of Science:

  • Photonics and Metamaterials
  • Terahertz (THz) Technology
  • Topological Materials Science

Background:

  • The terahertz (THz) frequency range (0.1–10 THz) is vital for high-speed communication, imaging, and sensing.
  • Topological materials exhibit unique electronic properties enabling robust waveguiding.
  • Metadevices offer advanced control over electromagnetic waves.

Purpose of the Study:

  • To review fundamental principles of topological components and reconfigurable metadevices in the THz range.
  • To explore strategies integrating topological properties and reconfigurability for THz applications.
  • To highlight the potential of these devices in chip-scale photonic circuits and free-space wavefront control.

Main Methods:

  • Leveraging topological properties of materials for waveguiding.
  • Utilizing advanced materials (liquid crystals, plasma, phase-change materials) for reconfigurability.
  • Investigating device implementation in photonic integrated circuits and free-space systems.

Main Results:

  • Topological THz metadevices enable robust, low-loss wave propagation.
  • Backscattering is effectively suppressed, essential for high-frequency operation.
  • Real-time control over amplitude, frequency, and phase of THz waves is achieved.

Conclusions:

  • Topological metadevices are critical for advanced THz photonic technologies and 6G communications.
  • Integration of topological properties and reconfigurability opens new avenues for THz sensing and communication.
  • These advancements pave the way for next-generation chip-scale photonic circuits and wavefront control systems.