Results 101 to 110 of about 141,776 (244)
Broadband Terahertz Transparency in a Switchable Metasurface
IEEE Photonics Journal, 2015 Plasmon-induced transparency in terahertz metamaterials markedly modifies the dispersive properties of an otherwise opaque medium and reveals unprecedented prospects on novel functional components.
Xiaoqiang Su +8 more
doaj +1 more source
Multispectral Polarization‐Insensitive Graphene/Silicon Guided Mode Resonance Active Metasurfaces
Advanced Photonics Research, EarlyView.CMOS‐compatible graphene/silicon active metasurfaces based on guided‐mode resonance filters are investigated. Simulations reveal a high extinction ratio (>25 dB), a narrow linewidth (≈1.5 nm), and polarization‐insensitive operation. Multispectral mid‐infrared performance is achieved via geometrical scaling.
Prateeksha Sharma +5 more
wiley +1 more source
Surface plasmons in terahertz metamaterials
Optics Express, 2008 We characterize terahertz metamaterials by applying apertureless near-field microscopy with a bandwidth that covers the entire spectral response of the structures. The observations agree with the interpretation of the fundamental mode of the metamaterial. But the high frequency resonance shows properties that deviate from the common interpretation.
F. Kuchler +5 more
openaire +3 more sources
Results in Physics, 2021 In the terahertz (THz) fields, a crucial point of restricting its development and application is the lack of dynamic and multifunctional materials. In this work, NiTi films are innovatively introduced into the design, and multifunctional and dynamically ...
Changlong Tan +4 more
doaj
Switchable Terahertz Beam Steering with Near‐Perfect Ordinary Transmission
Advanced Photonics Research, EarlyView.This study introduces a reconfigurable metasurface that enables switchable terahertz beam steering upon actuation by a global temperature change. At room temperature, it achieves a true “OFF” state with nearly 100% transmission, behaving as if the metasurface is not present, thereby not distorting incoming light.
Zhixiang Huang +11 more
wiley +1 more source
Terahertz saturable absorption in superconducting metamaterials [PDF]
Journal of the Optical Society of America B, 2016 We present a superconducting metamaterial saturable absorber at terahertz frequencies. The absorber consists of an array of split ring resonators (SRRs) etched from a 100nm YBaCu3O7 (YBCO) film. A polyimide spacer layer and gold ground plane are deposited above the SRRs, creating a reflecting perfect absorber.
Keiser, George R. +4 more
openaire +3 more sources
Mapping active strain using terahertz metamaterial laminates
APL Photonics, 2021 The ability to image strain fields in composite materials is an indispensable necessity for structural health monitoring. Embedded electromagnetic metamaterials sensitive to applied stresses and operating in the terahertz regime have been proposed as a ...
Omar Khatib +4 more
doaj +1 more source
Advanced Theory and Simulations, EarlyView.A novel metamaterial absorber is designed, simulated, and validated for both 5G mmWave and THz applications, achieving >95.8% and 90% absorption, respectively. Its polarization‐insensitive, scalable design enables applications in THz NDT, imaging, and EMI shielding.
Ahmet Teber
wiley +1 more source
Terahertz waves dynamic diffusion in 3D printed structures
Scientific Reports, 2022 Applications of metamaterials in the realization of efficient devices in the terahertz band have recently been considered to achieve wave deflection, focusing, amplitude manipulation and dynamical modulation.
Mauro Missori +2 more
doaj +1 more source
Advanced Science, EarlyView.Reconfigurable metasurfaces typically require human intervention or complex, resource‐heavy processes. This innovative self‐adaptive metasurface senses an incident wave's direction, adjusting reflection in real‐time using a simple electronics module. It eliminates external controllers, reducing response time, energy consumption, and costs. Applications
Bo‐Wen Ren +4 more
wiley +1 more source