dielectric materials,elemental semiconductors,nanophotonics,optical metamaterials,Q-factor,silicon,terahertz wavesA novel free-standing dielectric metasurface that shows a strong toroidal resonance in the sub- THz range is proposed and demonstrated. Theoretical and experimental studies confirm the basic ...
However, several feasible approaches can be applied to improve the efficiency, such as introducing multilayer metasurfaces51, operating in reflection mode in a sandwich-type configuration23 (see supplementary Figure S9) or replacing the metal constituents with dielectric counterparts52. Such a beam ...
参考文献 [1] CUI T,BAI B,SUN H.Tunable metasurfaces based on active materials[J].Advanced Functioniona Materials,2019,29(10):1806692. [2] MORIN F J.Oxides which show a metal-to-insulator transition at the Neel temperature[J].Physical Review Letters,1959,3(1):34-36. [3] QAZIBASH M...
Figure 1 represents the basic meta-atom of the VO2 integrated metasurface composing of three layers, which, from top to bottom, are the VO2 layers, dielectric substrate, and a gold plane to impede the transmission energy into the back of the VBCM. At the top layer, three patterned VO2 ...
In the field of photonics, the past decade has witnessed a revolution spurred by the extensive and rapid development of optical metamaterials and metasurfaces18,19,20. These innovations consist of engineered subwavelength building blocks, usually composed of metal or high-index dielectric meta-atoms,...
The transmission response of metallo-dielectric grid metasurfaces is experimentally investigated through Terahertz Time Domain Spectroscopy and the corresponding effective dielectric function is retrieved. Using a lumped element model we can determine the dependence of the effective plasma frequency (the ...
In order to reduce dielectric loss and provide an electric shield for the transmission of the electric field into the metamaterial array cavity, an array of Interconnected Dumple (IT)-Shaped (ITS) EBG unit cells is positioned strategically on both sides of the biosensor in addition to the ...
et al. Achromatic terahertz Airy beam generation with dielectric metasurfaces. Nanophotonics 10, 1123–1131 (2021). 39. Song, E.-Y. et al. Compact generation of airy beams with C-aperture metasurface. Adv. Opt. Mater. 5, 1601028 (2017). 40. Hao, W., Deng, M., Chen, S. & Chen,...
Conventional approaches of THz interconnect waveguides such as metallic transmission line7, dielectric strip waveguide8, photonic crystal waveguide9, and THz fibers10 are prone to defects, reflection/scattering loss, material dispersion, bending loss, and lack active tunability. These challenges have ...
It can be concluded that the conductivity of graphene and perovskite changes because of the incorporation of protein, leading to an alteration of the dielectric environment of the metasurface and an increase in Δƒ with increasing CWP. Both the mobility and concentration of charge carriers in ...