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Lu Ding, Qing Yang Steve Wu, Jun Feng Song, Kazunori Serita, Masayoshi Tonouchi and Jing Hua Teng Perfect Broadband Terahertz Antireflection by Deep-Subwavelength, Thin, Lamellar Metallic Gratings Advanced Optical Materials 1

Version of Record online: 20 OCT 2013 | DOI: 10.1002/adom.201300321

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Perfect broadband terahertz antireflection coatings are demonstrated by deep-subwavelength, thin, lamellar metallic gratings both in theory and experiment. Abrupt phase changes introduced by grating to terahertz wave traversing the coated surface can be tuned from 0 to π as a function of grating parameters. At π/2, the impedance difference between two dielectrics is matched and perfect antireflection occurs.

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