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
Handedness-selective chiral transport is an intriguing phenomenon that not only holds signifcant importance for fundamental research but also carries application prospects in fields such as optical communications and ...Handedness-selective chiral transport is an intriguing phenomenon that not only holds signifcant importance for fundamental research but also carries application prospects in fields such as optical communications and sensing.Currently,on-chip chiral transport devices are static,unable to modulate the output modes based on the input modes.This limits both device functionality reconfiguration and information transmission capacity.Here,we propose to use the incident polarization diversity to control the Hamiltonian evolution path,achieving polarization-dependent chiral transport.By mapping the evolution path of TE and TM polarizations onto elaborately engineered double-coupled waveguides,we experimentally demonstrate that different polarizations yield controllable modal outputs.This work combines Multiple-lnput,Multiple-Output,and polarization diversity concepts with chiral transport and challenges the prevailing notion that the modal outputs are fixed to specific modes in chiral transport,thereby opening pathways for the development of on-chip reconfigurable and high-capacity handedness-selective devices.展开更多
Single-pixel imaging is a burgeoning computational imaging technique that utilizes a single detector devoid of spatial resolution to capture an image,offering great potential for creating cost-effective and simplified...Single-pixel imaging is a burgeoning computational imaging technique that utilizes a single detector devoid of spatial resolution to capture an image,offering great potential for creating cost-effective and simplified imaging systems.Nevertheless,achieving super-resolution with a single pixel remains a formidable challenge.Here,we introduce a single-pixel super-resolution imaging technique based on space–time modulation.The modulation parametrically mixes the incoming signals,enabling the space–time scattered signals of the object carrying finer details to be captured by the single-pixel imaging system.To validate our proposed technique,we designed and fabricated a computational metasurface imager that needs only a single transmitting port and a single receiving port.The achieved resolution surpasses the Abbe resolution limit.The principle of our proposed technique is well-suited for low-cost and compact imaging systems.展开更多
In the article titled“Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs”[1],there were errors in Figure 2 which occurred during production.In panel(c),the red ...In the article titled“Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs”[1],there were errors in Figure 2 which occurred during production.In panel(c),the red line should be attributed to“Re(ZNIC/Z0)”and the blue line should be attributed to“Im(ZNIC/Z0).”In panel(d),the blue line should read“∣S 21∣=∣S12∣”and the black line should read“|S22|.”The corrected figure is shown as Figure 1 below.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.
基金National Natural Science Foundation of China(Grant No.12474382)National Key Research and Development Project of China(Grant No.2024YFA1209302)+1 种基金Science,Technology and Innovation Commission of Shenzhen Municipality(Grant No.JCYJ20220530161010023)Key Laboratory of High-Temperature Electromagnetic Materials and Structure of MOE,Wuhan University of Science and Technology(GrantNo.KB202501).
文摘Handedness-selective chiral transport is an intriguing phenomenon that not only holds signifcant importance for fundamental research but also carries application prospects in fields such as optical communications and sensing.Currently,on-chip chiral transport devices are static,unable to modulate the output modes based on the input modes.This limits both device functionality reconfiguration and information transmission capacity.Here,we propose to use the incident polarization diversity to control the Hamiltonian evolution path,achieving polarization-dependent chiral transport.By mapping the evolution path of TE and TM polarizations onto elaborately engineered double-coupled waveguides,we experimentally demonstrate that different polarizations yield controllable modal outputs.This work combines Multiple-lnput,Multiple-Output,and polarization diversity concepts with chiral transport and challenges the prevailing notion that the modal outputs are fixed to specific modes in chiral transport,thereby opening pathways for the development of on-chip reconfigurable and high-capacity handedness-selective devices.
基金National Natural Science Foundation of China(61731007,62071152,62271170)。
文摘Single-pixel imaging is a burgeoning computational imaging technique that utilizes a single detector devoid of spatial resolution to capture an image,offering great potential for creating cost-effective and simplified imaging systems.Nevertheless,achieving super-resolution with a single pixel remains a formidable challenge.Here,we introduce a single-pixel super-resolution imaging technique based on space–time modulation.The modulation parametrically mixes the incoming signals,enabling the space–time scattered signals of the object carrying finer details to be captured by the single-pixel imaging system.To validate our proposed technique,we designed and fabricated a computational metasurface imager that needs only a single transmitting port and a single receiving port.The achieved resolution surpasses the Abbe resolution limit.The principle of our proposed technique is well-suited for low-cost and compact imaging systems.
文摘In the article titled“Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs”[1],there were errors in Figure 2 which occurred during production.In panel(c),the red line should be attributed to“Re(ZNIC/Z0)”and the blue line should be attributed to“Im(ZNIC/Z0).”In panel(d),the blue line should read“∣S 21∣=∣S12∣”and the black line should read“|S22|.”The corrected figure is shown as Figure 1 below.
