Terahertz wave absorber and polarizer

摘要

PROBLEM TO BE SOLVED: To provide a terahertz wave absorber, a terahertz wave polarizer, and a switching element.SOLUTION: There is provided a terahertz wave absorber comprising helical magnetic Y-type ferrite in which a magnetic moment has a helical structure. The helical magnetic Y-type ferrite has a chemical formula of ABFeCO(0≤y≤1). In the chemical formula, a symbol A includes at least one divalent ion of Mg, Sr, Ba, Sc, Pb elements, a symbol B includes at least one divalent magnetic ion of Mn, Fe, Co, Ni, Cu elements, and a symbol C includes a trivalent ion of an optional element.SELECTED DRAWING: Figure 2B