Tunable terahertz all-dielectric linear-to-circular polarization conversion metasurface

• Autorzy: Ju Xiacao , Wang Weiguang , Liu Bingchao , Hou Yanzhao , Wen Huashun , Yang Daquan

Identyfikatory

DOI

10.37190/oa220406

• Języki publikacji: EN

Abstrakty

EN

Terahertz (THz) linear-to-circular (LTC) polarization conversion plays a crucial role in imaging and 6G wireless communication. This paper will give an account of a thermally tunable THz LTC polarization converter by using the active all-dielectric metasurface. It consists of zirconium oxide (ZrO₂) microsphere resonators, active strontium titanate (STO) cladding, and flexible polyimide substrate. Through numerical simulation, the amplitude of the ellipticity of the proposed polarization converter at 0.265 THz is –1, indicating that perfect right-hand circular polarization (RHCP) wave is achieved. Meanwhile, the amplitude of the ellipticity is less than –0.8 between 0.247 and 0.278 THz (relative bandwidth is 12%). In addition, with the temperature changes of 180 K (from 200 to 380 K), the operating frequency of the converter can be tuned from 0.220 to 0.291 THz, a sensitivity about 39 GHz/100 K is achieved. Besides, the modulation depth of the ellipticity amplitude can achieve 92% at 0.220 THz, which demonstrates that the converter can output terahertz wave with different polarization states, and the device can be fabricated on a large scale. These perfect conversion performances show that the converter has potential applications in high-speed communication and imaging.

Słowa kluczowe

EN

terahertz waves; dynamically tunable; strontium titanate; polarization conversion; all-dielectric metasurface

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2022
• Tom: Vol. 52, nr 4
• Strony: 551--563
• Opis fizyczny: Bibliogr. 48 poz., rys.

Twórcy

autor

Ju Xiacao

• School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Wang Weiguang

• School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Liu Bingchao

• Lenovo Research, Beijing 100094, China

autor

Hou Yanzhao

• School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
• National Engineering Laboratory for Mobile Network Technologies, Beijing University of Posts and Telecommunications, Beijing 100876, China

autor

Wen Huashun

• State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
• School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

autor

Yang Daquan

• School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
• State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).