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Dual-band terahertz filters based on self-complementary metasurfaces (Conference Presentation)

Paper Abstract

The emergence of metamaterials, a new type of artificial materials exhibiting characteristics that are not available in nature, had a profound impact on the advances in terahertz (THz) science and technology by realizing appropriate electromagnetic responses in the THz frequency. Despite the recent efforts, the still existing needs for the more efficient manipulation of THz waves fuels the development of metamaterial based THz active and passive devices such as filters, polarizers, and modulators. In this work, we present a dual-band THz filter based on self-complementary metasurfaces that are two-dimensional arrays of the unit-cells consisting of an artificial resonator and its complementary counterpart. The unit cell of the self-complementary metamaterial utilized to realize the dual-band filter is based on a combination of a Jerusalem cross and its complementary structure designed to resonate in the THz regime. This structure functions as a selective band-stop filter (BSF) or band-pass filter (BPF) depending on the polarization states of the incident wave. It is also observed that the transmission phases of the two orthogonally polarized waves exhibit 90° phase difference in broad frequency range. It implies that it can be utilized as a quarter wave plate manipulating the polarization of the incident THz waves. The use of self-complementary structures enables the design of a 2-in-1 THz filter device whose function can be chosen between BPF and BSF by changing its orientation. The operating principles and design guidelines of the self-complementary metasurfaces will also be presented by using electromagnetic simulation and equivalent circuit method.

Paper Details

Date Published: 9 September 2019
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Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110801P (9 September 2019); doi: 10.1117/12.2528352
Show Author Affiliations
Celso Martines Leite, Gwangju Institute of Science and Technology (Korea, Republic of)
Hyo-Jeong Kim, Gwangju Institute of Science and Technology (Korea, Republic of)
Mi Jang, Gwangju Institute of Science and Technology (Korea, Republic of)
Muhammad Tayyab Nouman, Gwangju Institute of Science and Technology (Korea, Republic of)
Sungbae Lee, Gwangju Institute of Science and Technology (Korea, Republic of)
Jae-Hyung Jang, Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 11080:
Metamaterials, Metadevices, and Metasystems 2019
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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