Antireflection-assisted all-dielectric terahertz metamaterial polarization converter
KAUST DepartmentMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2018-09-06
Print Publication Date2018-09-03
Permanent link to this recordhttp://hdl.handle.net/10754/628765
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AbstractWe present a transmissive all-dielectric terahertz (THz) metamaterial half-wave plate with a double-working-layer structure. One layer works as a half-wave plate to enable polarization conversion of the incident THz wave, and the other layer functions as an antireflection layer to improve the transmission. The device is made of pure silicon only and can realize a high-performance polarization conversion at the designed THz frequency. Numerical simulations have been performed to show how the polarization properties of the THz wave can be adjusted by the structural parameters of the metamaterial. With appropriate structural parameters, the transmission for cross-polarization can reach 90%, and the polarization conversion rate can reach almost 100% at the designed operation frequency of 1 THz in simulation. Several samples have been fabricated and characterized, and the experimental results show a cross-polarized transmission of about 80% and a polarization conversion rate of almost 100% and agree well with the simulations.
CitationZi J, Xu Q, Wang Q, Tian C, Li Y, et al. (2018) Antireflection-assisted all-dielectric terahertz metamaterial polarization converter. Applied Physics Letters 113: 101104. Available: http://dx.doi.org/10.1063/1.5042784.
SponsorsThis work was supported by the National Basic Research Program of China (2014CB339800), the National Natural Science Foundation of China (61875150, 61622505, 61427814, 61377047, and 61420106006), the Program for Changjiang Scholars and Innovative Research Team in University (IRT13033), the Cooperative Innovation Center of Terahertz Science, and the U.S. National Science Foundation (ECCS-1232081).
JournalApplied Physics Letters