title: Bilayer metallic nanofilms as broadband antireflection coatings in terahertz optical systems.
abstract: We present the potential of ultrathin bilayer metallic nanofilms for use as broadband antireflection coatings in the terahertz frequency range. The metallic layers are modeled using a wave-impedance matching approach. The experimental and theoretical results are in good agreement. Further, a novel method using our broadband antireflection coatings is proposed to eliminate unwanted reflections that interfere with the important reflection from the sample in terahertz reflection measurement. The proposed method significantly improves the calculation of the optical properties of liquid and biological samples.
authors.forename: Wei En
authors.initials: WE
authors.lastname: Lai
authors.forename: Huai Wu
authors.initials: HW
authors.lastname: Zhang
authors.forename: Yao Hua
authors.initials: YH
authors.lastname: Zhu
authors.forename: Qi Ye
authors.initials: QY
authors.lastname: Wen
authors.forename: Wei Wei
authors.initials: WW
authors.lastname: Du
authors.forename: Xiao Li
authors.initials: XL
authors.lastname: Tang
mesh_terms: D065966:Absorption, Physicochemical; D007909:Lenses; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D055096:Optical Devices; D012542:Scattering, Radiation; D055053:Terahertz Radiation
chemical_list: D008567:Membranes, Artificial