Multitasking Device Regulated by the Gravity Field: Broadband Anapole‐Excited Absorber and Linear Polarization Converter

• Published in: Annalen der Physik 2022-09, Vol.534 (9), p.n/a
• Main Authors: Qu, Jia, Pan, Hao, Sun, Yuan‐Zhe, Zhang, Hai‐Feng
• Format: Article
• Language: English
• Subjects: Absorbers; Absorbers (materials); anapole mode; anapole‐excited absorber; Broadband; Conversion ratio; Gravitational fields; gravity field regulation; Incident waves; Interference; Linear polarization; linear polarization converter; Magnetic resonance; Metamaterials; Multitasking; multitasking device; Wave power
• ISSN: 0003-3804; 1521-3889
• DOI: 10.1002/andp.202200175

In this paper, an innovative multitasking device (MTD) regulated by the gravity field realizing the functions of metamaterial absorber (MMA) and linear polarization converter (LPC) is proposed and theoretically investigated. When the device operates in the function of MMA, the engineered SRR structure offers robust conditions for the formation of anapole mode. The anapole mode can lead to destructive interference in the far‐field and constructive interference within the configuration synchronously; thereby, the incident wave energy can be consumed strongly. It is verified that the proposed MTD in the MMA state can acquire a high absorption rate exceeding 0.9 from 10.82 to 13.55 GHz, with a broad relative bandwidth (RBW) of 22.4%. While in the LPC state, the utilization of the “L”‐shaped structure successfully introduces an equivalent magnetic resonance to achieve the translation of the incident wave polarization state. In this case, the orthogonal state of the incident beam can be obtained by the MTD with the polarization conversion ratio (PCR) over 0.9 in the range of 2.62–3.72 GHz, whose RBW is 34.7%. The design accomplishes the functional combination of MMA and LPC through the gravity field regulation, simultaneously staggering the operating bands to guarantee their independence and anti‐interference. An innovative multitasking device regulated by the gravity field realizing the functions of metamaterial absorber (MMA) and linear polarization converter (LPC) is proposed and theoretically investigated. In the MMA state, the anapole mode is excited and leads to broadband absorption. While in the LPC state, an equivalent magnetic resonance is introduced to achieve the conversion of the polarization state.