Abstract
This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0701004), the National Natural Science Foundation of China (Grant Nos. 61775159, 61420106006, 61427814, 61422509, 61735012, and 61505146), the Tianjin Municipal Fund for Distinguished Young Scholars (Grant No. 18JCJQJC45600), and King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (Grant No. OSR-2016-CRG5-2950).
Highlights
Over the past decades, terahertz (THz) waves are finding a growing number of applications in communications [1,2,3], security check [4], imaging [5], pharmaceutical quality control [6], and other fields because of their particular location in the electromagnetic spectrum [7,8,9,10,11]
The conversion between transverse electric (TE) and transverse magnetic (TM) waves in the measurement are achieved via two broadband linear polarizers P1 and P2 in the transmission arm, and P3 and P4 in the detection arm by two 45-degree-field-projection processes
The simplified model greatly facilitates the grating design procedure and is expected to find use in other similar design scenarios
Summary
Terahertz (THz) waves are finding a growing number of applications in communications [1,2,3], security check [4], imaging [5], pharmaceutical quality control [6], and other fields because of their particular location in the electromagnetic spectrum [7,8,9,10,11]. Functional devices for THz waves like polarization beam splitters (PBSs) are highly needed. Metamaterials are artificial materials with carefully designed subwavelength structures to obtain electromagnetic properties that cannot be found in natural materials. Many functional THz devices have been designed with metamaterials, such as polarization converters [19], absorbers [20], and so on. One can stack particular materials like black phosphorus with dielectric layers to achieve polarization
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