High-Efficiency Dielectric Metasurfaces for Polarization-Dependent Terahertz Wavefront Manipulation
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractRecently, metasurfaces made up of dielectric structures have drawn enormous attentions in the optical and infrared regimes due to their high efficiency and designing freedom in manipulating light propagation. Such advantages can also be introduced to terahertz frequencies where efficient functional devices are still lacking. Here, polarization-dependent all-silicon terahertz dielectric metasurfaces are proposed and experimentally demonstrated. The metasurfaces are composed of anisotropic rectangular-shaped silicon pillars on silicon substrate. Each metasurface holds dual different functions depending on the incident polarizations. Furthermore, to suppress the reflection loss and multireflection effect in practical applications, a high-performance polarization-independent antireflection silicon pillar array is also proposed, which can be patterned at the other side of the silicon substrate. Such all-silicon dielectric metasurfaces are easy to fabricate and can be very promising in developing next-generation efficient, compact, and low-cost terahertz functional devices.
CitationZhang H, Zhang X, Xu Q, Tian C, Wang Q, et al. (2017) High-Efficiency Dielectric Metasurfaces for Polarization-Dependent Terahertz Wavefront Manipulation. Advanced Optical Materials: 1700773. Available: http://dx.doi.org/10.1002/adom.201700773.
SponsorsThis work was supported by the National Basic Research Program of China (Grant No. 2014CB339800), the National Science Foundation of China (Grant Nos. 61605143, 61422509, 61622505, 61675145, and 61420106006), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT13033), the Major National Development Project of Scientific Instruments and Equipment (Grant No. 2011YQ150021), and the Guangxi Key Laboratory of Automatic Detecting Technology and Instruments (YQ17203).
JournalAdvanced Optical Materials