A compact antenna structure for circular polarized terahertz radiation

Shalini, M.; Madhan, M. Ganesh

doi:10.1016/j.ijleo.2021.166393

Cited by 21 publications

(3 citation statements)

References 18 publications

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“…The disparity in the excitation efficiency of the SPP wave between LCP and RCP light is ascribed to the interference between the co-polarized and cross-polarized radiation of the twisted metal strip. The circular-polarization selectivity in asymmetric metamaterials is discernible by examining the interference of co-polarized and cross-polarized components in the reflection field [33]. CPL is decomposable into two orthogonal electric fields, E x and E y , with a phase difference of π/2.…”

Section: Results and Analysismentioning

confidence: 99%

“…While substantial research has been concentrated on integrated circular-polarization detectors in the visible-to-mid-infrared range, the THz band remains relatively underexplored. The THz band, noted for its low photon energy [24,25], robust penetration capabilities [26,27], expansive communication bandwidth [28,29], and superior spatial and temporal resolution [30][31][32] compared to microwaves, holds significant potential for advancing imaging, spectroscopy, and wireless communication [33]. Thus, the development of miniaturized THz circular-polarization detectors, which addresses the challenges posed by bulky non-integrated detectors and the scarcity of suitable polarization optics in the THz range, is not only of great significance but also imminent.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

Li,

Zhou,

Deng

et al. 2024

Photonics

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Recent advancements in terahertz (THz) wave technology have highlighted the criticality of circular-polarization detection, fostering the development of more compact, efficient on-chip THz circular-polarization detectors. In response to this technological imperative, we presented a chiral-antenna-integrated GaAs/AlGaAs quantum well (QW) THz detector. The chiral antenna selectively couples the incident light of a specific circular-polarization state into a surface-plasmon polariton wave that enhances the absorptance of the QWs by a factor of 12 relative to a standard 45° faceted device, and reflects a significant amount of the incident light of the orthogonal circular-polarization state. The circular-polarization selectivity is further enhanced by the QWs with a strong intrinsic anisotropy, resulting in a circular-polarization extinction ratio (CPER) as high as 26 at 6.52 THz. In addition, the operation band of the device can be adjusted by tuning the structural parameters of the chiral structure. Moreover, the device preserves a high performance for oblique incidence within a range of ±5°, and the device architecture is compatible with a focal plane array. This report communicates a promising approach for the development of miniaturized on-chip THz circular-polarization detectors.

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Section: Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

Li,

Zhou,

Deng

et al. 2024

Photonics

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“…For this reason, many researches have been conducted to design circular polarized antenna. In [20] circular polarized graphene-based patch antenna is presented and analyzed over terahertz frequencies. The presented antenna was analyzed in terms of axial ration (AR) bandwidth, returns loss, VSWR and gain.…”

Section: Introductionmentioning

confidence: 99%

A circularly polarized wideband high gain antenna for THz wireless applications

Lchhab

Ghzaoui

2022

Opt Quant Electron

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For several years, the elds of new technologies have been experiencing a real boom. The use of the terahertz band is an appropriate solution to meet the requirements of these technology. However, this technology has special requirements among which its antennas must have high bandwidth of few THz and achieve high gain for high productivity. In this paper, we will focus on the design and analysis of an antenna for THz technology. The antenna structure proposed in this work has better performance in terms of bandwidth and gain. In fact, multiples slots were added to the antenna to enhance the antenna's bandwidth. in addition, to enhance the antenna performance in terms of gain and protect the antenna feed line against environmental jeopardies a thin layer as superstrate is used. The suggested antenna covers a wide − 10dB bandwidth from 0.9 THz to 17.3 THz with a peak gain of 12.8 dBi. Moreover, a VSWR less than 2 at the operating band is obtained. Furthermore, the suggested antenna has circular polarized radiations with an axial ration (AR) less than 3 dB over a wide band 13.6THz-17.3THz which mean that the proposed antenna is well suited for application where the transmitter and receiver are moving which is the most case for wireless system. Thus, the suggested THz antenna could be a successful choice for terahertz application like future high-speed short-range indoor wireless communication, explosive detections, arms detection, medical imaging, pharmaceutical analysis, and material characterization in the THz regime industrial inspections.

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Antenna at Terahertz Band: Challenges, Fabrication and Specification

Patel,

Thanki

2023

ICT Systems and Sustainability

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A compact antenna structure for circular polarized terahertz radiation

Cited by 21 publications

References 18 publications

Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

A circularly polarized wideband high gain antenna for THz wireless applications

Antenna at Terahertz Band: Challenges, Fabrication and Specification

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