Küçüksarı Ö., Çimen S.
OPTICAL AND QUANTUM ELECTRONICS, cilt.57, sa.6, ss.1-19, 2025 (Scopus)
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Yayın Türü:
Makale / Tam Makale
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Cilt numarası:
57
Sayı:
6
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Basım Tarihi:
2025
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Doi Numarası:
10.1007/s11082-025-08307-9
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Dergi Adı:
OPTICAL AND QUANTUM ELECTRONICS
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Derginin Tarandığı İndeksler:
Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
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Sayfa Sayıları:
ss.1-19
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Kocaeli Üniversitesi Adresli:
Evet
Özet
Abstract
This study presents a compact and multifunctional terahertz polarization converter designed to achieve both linear–to–circular (LTC) and linear–to–linear (LTL) polarization conversions over multiple frequency bands. The proposed structure consists of a reflective metamaterial composed of a dielectric substrate and three diagonally slotted gold elements arranged concentrically. For accurate determination of LTC regions, stringent design criteria of axial ratio (AR) ≤ 1 dB and phase difference (∆φ) ± 5° were adopted. The structure exhibits LTC polarization conversion within the frequency bands of 0.449–0.455 THz, 0.5404–0.8049 THz, and 1.182–1.587 THz. Similarly, the LTL conversion regions were defined using polarization conversion ratio (PCR) ≥ 0.9 and ∆φ < ± 5°, and were observed in the bands of 0.4906–0.4912 THz, 0.9739–0.9743 THz, and 1.699–1.702 THz. The structure has been analyzed both numerically and analytically, and its performance was benchmarked against state–of–the–art designs. With its compact size, broad functional range, and precise definition of polarization metrics, the proposed converter offers significant potential for applications in advanced radar systems, satellite communication, high–speed wireless links, and terahertz imaging.