Cavity-excited Huygens’ metasurface for wavefront manipulation
نویسندگان
چکیده
In this paper, cavity-excited Huygens’ metasurface is proposed for high-efficiency wavefront manipulation. By adjusting the length of electric dipole and magnetic , meta unit can provide nearly 360° phase coverage with sufficiently high transmission efficiency. Based on analysis resonance mode cavity, has successfully performed its function by adopting integrated feeding method. According to generalized Snell’s law, metasurfaces different gradients are designed. Combined cavity structure, one-dimensional excited realized, which directionally emit electromagnetic waves from cavity. Both simulation experimental results show that effectively manipulate direction emitted beam. Such a kind flexibly control emission angle wave, reduce energy loss improve efficiency wave. These designs have advantages compact, light easy integration.
منابع مشابه
Cavity-excited Huygens' metasurface antennas for near-unity aperture illumination efficiency from arbitrarily large apertures
One of the long-standing problems in antenna engineering is the realization of highly directive beams using low-profile devices. In this paper, we provide a solution to this problem by means of Huygens' metasurfaces (HMSs), based on the equivalence principle. This principle states that a given excitation can be transformed to a desirable aperture field by inducing suitable electric and (equival...
متن کاملMetasurface external cavity laser
A vertical-external-cavity surface-emitting-laser is demonstrated in the terahertz range, which is based upon an amplifying metasurface reflector composed of a sub-wavelength array of antennacoupled quantum-cascade sub-cavities. Lasing is possible when the metasurface reflector is placed into a low-loss external cavity such that the external cavity—not the sub-cavities—determines the beam prope...
متن کاملSubwavelength diffractive acoustics and wavefront manipulation with a reflective acoustic metasurface
Acoustic metasurfaces provide useful wavefront shaping capabilities, such as beam steering, acoustic focusing, and asymmetric transmission, in a compact structure. Most acoustic metasurfaces described in the literature are transmissive devices and focus their performance on steering sound beam of the fundamental diffractive order. In addition, the range of incident angles studied is usually bel...
متن کامل3-D traveltime computation by Huygens wavefront tracing
In this paper, I present a 3-D implementation of Huygens wavefront tracing. The threedimensional version of the method retains the characteristics of the two-dimensional one: stability, accuracy, and efficiency. The major difficulty of the 3-D extension is related to the handling of triplications. An easy to implement solution is to approximate the wavefronts at the triplications as planes orth...
متن کامل3-D traveltime computation using Huygens wavefront tracing
Traveltime computation is widely used in seismic modeling, imaging, and velocity analysis. The two most commonly used methods are ray tracing and numerical solutions to the eikonal equation. Eikonal solvers are fast and robust but are limited to computing only the firstarrival traveltimes. Ray tracing can compute multiple arrivals but lacks the robustness of eikonal solvers. We propose a robust...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chinese Physics
سال: 2022
ISSN: ['1000-3290']
DOI: https://doi.org/10.7498/aps.71.20221284