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 ...
We considered a metasurface consisting of dielectric rods arranged into the lattice with the permittivity of the rodsε = 10, lattice perioda = 37.5 mm, radius and height of dielectric rods arer = 1.5 mm andh = 10 mm, respectively. The cluster sizeR(Fig.1a, b)...
Large-angle directional scattering of terahertz beams based on all-dielectric metasurface doi:10.1140/epjd/s10053-025-00998-9The traditional terahertz metasurface beam deflector has low efficiency with large exit angle, which limited its use. To improve splitting angle, a terahertz large-angle ...
A mid-infrared to terahertz ultra-broadband all-dielectric absorber is proposed and numerically verified, which consists of a single medium of tantalum pentoxide (Ta2O5) with pyramid arrays on a film substrate. Absorption is higher than 0.9 between 0.72 and 100 THz with a bandwidth of 99.28 THz...
Bound states in the continuum (BICs) are ubiquitous in many areas of physics, attracting special interest for their ability to confine waves with infinite lifetimes. Metasurfaces provide a suitable platform to realize them in photonics; such BICs are rem
A dual-band terahertz (THz) perfect absorber (PA) based on the all-dielectric metamaterial (MM) composed of the vertical-square-split-ring (VSSR) structure InSb array was proposed and investigated numerically. Simulation results show that the absorbance of the proposed PA under room temperature ...
The flexibly manipulated terahertz wave is currently a hot research topic. To address this challenge, we proposed anall-dielectric coding metasurface for shaping the terahertz wave including beam splitting, beam deflection, vortexbeam generators, and a vortex beam and multi-beam splitting combination by...
Metasurfaces are usually constituted of regular metal and dielectric materials specifically crafted to give a desired electromagnetic response. It is the combination of the shape and dispersion properties of the inclusions that determines the properties of the whole system. Exploiting materials with nontri...
(b) Schematics of all-dielectric metasurfaces for polarization manipulation. Besides the phase manipulation, taking advantages of strong light–matter interactions at the subwavelength scale, metasurfaces also show a powerful capability to regulate light with different degrees of freedom (DoFs) such as ...
[50]Y. K. Srivastava, R. T. Ako, M. Gupta, M. Bhaskaran, S. Sriram, and R. Singh, “Terahertz sensing of 7 nm dielectric film with bound states in the continuum metasurfaces,”Appl. Phys. Lett., vol. 115, p. 151105, 2019,https://doi.org/10.1063/1.5110...