For decades, there has been tremendous effort to fashion focal plane arrays for THz imaging owing to the great number of potential applications. Here, we propose and demonstrate an alternative approach which utilizes all-dielectric metasurface absorbers that act as universal converters of radiation. ...
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)...
Our experimental results are well described by theory and simulations and not limited to the THz range, but may be extended to microwave, infrared and optical frequencies. The concept of an all-dielectric metasurface absorber offers a new route for control of the emission and absorption of ...
Applications of polarization beam splitters (PBSs) with all-dielectric metasurfaces. (a) A metasurface-based chirality-distinguishing beam splitter based on the chirality-dependent geometric phase of amorphous silicon (a-Si) nanofin [81]. (b) A geometric phase metasurface-based PBS for optical edg...
In this paper, an all dielectric metasurface is proposed, which can flexibly manipulate the terahertz wave high-efficiency abnormal refraction, beam splitting and orbital angular momentum beam generation. Four kinds of elements are designed to meet the transmission phase at 0.94 THz and the phase ...
We designed an optically thin photoconductive channel as an all-dielectric metasurface comprising an array of low-temperature grown GaAs nanobeams and a sub-surface distributed Bragg reflector. The metasurface exhibited enhanced optical absorption, and it was integrated into a photoconductive THz detector...
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
Keywords: all-dielectric metasurface; bound states in the continuum; terahertz sensing; toroidal dipole 1 Introduction Terahertz (THz) technology has made great achievements in a large number of applications including biomedical diagnosis [1], security screening [2], and wireless...
Polarization-dependent all-dielectric metasurface for single-shot quantitative phase imaging. Nano Lett. 21, 3820–3826 (2021). Article ADS Google Scholar Ji, A. Q. et al. Quantitative phase contrast imaging with a nonlocal angle-selective metasurface. Nat. Commun. 13, 7848 (2022). Article ...
Dielectric metasurfaces have opened promising possibilities to enable a versatile platform in the miniaturization of optical elements at visible and infrared frequencies. Due to high efficiency and compatibility with CMOS fabrication technology, silicon-based metasurfaces have a remarkable potential for a wi...