The terahertz(THz)frequency range,situated between microwave and infrared radiation,has emerged as a pivotal domain with broad applications in high-speed communication,imaging,sensing,and biosensing.The development of...The terahertz(THz)frequency range,situated between microwave and infrared radiation,has emerged as a pivotal domain with broad applications in high-speed communication,imaging,sensing,and biosensing.The development of topological THz metadevices represents a notable advancement for photonic technologies,leveraging the distinctive electronic properties and quantum-inspired phenomena inherent to topological materials.These devices enable robust waveguiding capabilities,positioning them as critical components for on-chip data transfer and photonic integrated circuits,particularly within emerging 6G communication frameworks.A principal advantage resides in the capacity to maintain low-loss wave propagation while effectively suppressing backscattering phenomena,a critical requirement for functional components operating at higher frequencies.In parallel,by leveraging advanced materials such as liquid crystals,plasma,and phase-change materials,these devices facilitate real-time control over essential wave parameters,including amplitude,frequency,and phase,which augments the functionality of both communication and sensing systems,opening new avenues for THz-based technologies.This review outlines fundamental principles of topological components and reconfigurable metadevices operating at THz frequencies.We further explore emerging strategies that integrate topological properties and reconfigurability,with a specific focus on their implementation in chip-scale photonic circuits and free-space wavefront control.展开更多
基金the Nanyang Assistant Professorship Start-up Grant and Ministry of Education(Singapore)under AcRF TIER1(RG61/23)support from the Simons Foundation and the Air Force Office of Scientific Research MURI program.
文摘The terahertz(THz)frequency range,situated between microwave and infrared radiation,has emerged as a pivotal domain with broad applications in high-speed communication,imaging,sensing,and biosensing.The development of topological THz metadevices represents a notable advancement for photonic technologies,leveraging the distinctive electronic properties and quantum-inspired phenomena inherent to topological materials.These devices enable robust waveguiding capabilities,positioning them as critical components for on-chip data transfer and photonic integrated circuits,particularly within emerging 6G communication frameworks.A principal advantage resides in the capacity to maintain low-loss wave propagation while effectively suppressing backscattering phenomena,a critical requirement for functional components operating at higher frequencies.In parallel,by leveraging advanced materials such as liquid crystals,plasma,and phase-change materials,these devices facilitate real-time control over essential wave parameters,including amplitude,frequency,and phase,which augments the functionality of both communication and sensing systems,opening new avenues for THz-based technologies.This review outlines fundamental principles of topological components and reconfigurable metadevices operating at THz frequencies.We further explore emerging strategies that integrate topological properties and reconfigurability,with a specific focus on their implementation in chip-scale photonic circuits and free-space wavefront control.
