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9 September 2019 Dual-band terahertz filters based on self-complementary metasurfaces (Conference Presentation)
Celso Martines Leite, Hyo-Jeong Kim, Mi Jang, Muhammad Tayyab Nouman, Sungbae Lee, Jae-Hyung Jang
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Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 110801P (2019) https://doi.org/10.1117/12.2528352
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States
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.
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Celso Martines Leite, Hyo-Jeong Kim, Mi Jang, Muhammad Tayyab Nouman, Sungbae Lee, and Jae-Hyung Jang "Dual-band terahertz filters based on self-complementary metasurfaces (Conference Presentation)", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110801P (9 September 2019); https://doi.org/10.1117/12.2528352
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KEYWORDS
Terahertz radiation
Metamaterials
Polarization
Structural design
Wave plates
Electromagnetism
Linear filtering
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