Full wave numerical analysis of wideband and high directive log spiral<scp>THz</scp>photoconductive antenna

Dhiflaoui, Amira; Yahyaoui, Ali; Yousaf, Jawad; Aguili, Taoufik; Hakim, Bandar; Rmili, Hatem; Mittra, R.

doi:10.1002/jnm.2761

Cited by 10 publications

(5 citation statements)

References 29 publications

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“…The multiple peak response character is caused by the multiple internal reflection from the substrate interface (or excitation of substrate modes), which can lead to antenna pattern (gain and input impedance) degradation 60 . This phenomenon can be solved by making substrate thinner, using interconnection metallization, integrating a substrate lenses, or using a conductive substrate 61 – 63 . The difference for peak performance in the four bands may originate from the difference in coupling efficiency of the antenna.…”

Section: Resultsmentioning

confidence: 99%

Plasmonic semiconductor nanogroove array enhanced broad spectral band millimetre and terahertz wave detection

et al. 2021

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High-performance uncooled millimetre and terahertz wave detectors are required as a building block for a wide range of applications. The state-of-the-art technologies, however, are plagued by low sensitivity, narrow spectral bandwidth, and complicated architecture. Here, we report semiconductor surface plasmon enhanced high-performance broadband millimetre and terahertz wave detectors which are based on nanogroove InSb array epitaxially grown on GaAs substrate for room temperature operation. By making a nanogroove array in the grown InSb layer, strong millimetre and terahertz wave surface plasmon polaritons can be generated at the InSb–air interfaces, which results in significant improvement in detecting performance. A noise equivalent power (NEP) of 2.2 × 10−14 W Hz−1/2 or a detectivity (D*) of 2.7 × 1012 cm Hz1/2 W−1 at 1.75 mm (0.171 THz) is achieved at room temperature. By lowering the temperature to the thermoelectric cooling available 200 K, the corresponding NEP and D* of the nanogroove device can be improved to 3.8 × 10−15 W Hz−1/2 and 1.6 × 1013 cm Hz1/2 W−1, respectively. In addition, such a single device can perform broad spectral band detection from 0.9 mm (0.330 THz) to 9.4 mm (0.032 THz). Fast responses of 3.5 µs and 780 ns are achieved at room temperature and 200 K, respectively. Such high-performance millimetre and terahertz wave photodetectors are useful for wide applications such as high capacity communications, walk-through security, biological diagnosis, spectroscopy, and remote sensing. In addition, the integration of plasmonic semiconductor nanostructures paves a way for realizing high performance and multifunctional long-wavelength optoelectrical devices.

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Section: Resultsmentioning

confidence: 99%

Plasmonic semiconductor nanogroove array enhanced broad spectral band millimetre and terahertz wave detection

et al. 2021

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“…Through simulation optimization, we successfully increased the impedance bandwidth of the antenna from 300 GHz to 350 GHz, and the relative bandwidth from 94% to 107%. Antennas with an impedance bandwidth greater than or equal to 500 MHz or a fractional bandwidth (FBW) greater than 20% are typically referred to as ultra-wideband (UWB) antennas [25]. For the proposed novel bowtie and circular patch combination terahertz antenna, the −10 dB impedance bandwidth (|S11| ≤ −10 dB) and FBW are approximately 350 GHz and 107%, respectively.…”

Section: Optimized Antenna Radiation Performancementioning

confidence: 99%

Design of a Novel Broadband Antenna for Photomixer Chips in the Terahertz Frequency Range

Chu,

Han,

et al. 2023

Photonics

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A novel broadband antenna designed for the terahertz (THz) frequency range is proposed and developed for the THz emitter on a photomixer chip. This THz emitter comprises an ultra-high-speed indium phosphide photodetector integrated with a planar THz antenna. This paper presents a novel broadband antenna configuration comprising a combination of bowtie and circular patch elements designed for the frequency range of 150 GHz to 500 GHz. Detailed parametric analysis of the antenna’s design parameters is also provided. The simulation results demonstrate that the optimized antenna achieves an impedance bandwidth of 350 GHz, satisfying the |S11| ≤ −10 dB condition, and exhibits a relative bandwidth of 107% within the 150 GHz to 500 GHz frequency range. This novel broadband terahertz antenna showcases an exceptional wideband performance and is highly suitable for high-speed transmission systems.

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“…The performance of a MIIM rectenna can be further enhanced by combining it with a metasurface superstrate. The metasurfaces can be used to focus the incoming infrared and light waves for enhanced energy conversion [18][19][20][21]. The localized surface plasmons can be achieved using metasurfaces in the infrared range [19,22,23] and this too decreases the overall harvester structure as compared to reported large-size array configurations [12,13] for the same purpose.…”

Section: Introductionmentioning

confidence: 99%

MIIM Rectenna with a Meta-lens for Enhanced IR Energy Scavenging at 28.3 THz

Yahyaoui,

Elsharabasy,

Yousaf

et al. 2023

Preprint

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This work presents the design and analysis of a novel metal-insulator-insulator-metal (MIIM) rectenna with an added meta lens on top of it for efficient and robust infrared (IR) energy harvesting at 28.3 THz. To ensure maximum transfer of the captured IR radiations by an antenna with better impedance matching, the log-spiral antenna terminals are used as rectenna electrodes while two different insulators are placed between its feeding terminals to form the MIIM rectenna. A split ring-based resonating metasurface is designed and placed on the top of the MIIM rectenna to focus the incoming electromagnetic radiations. The characterization of the MIIM rectenna with added meta lens, in terms of absorbed E-field, is performed for the four different work function metals (gold aluminum, silver, and copper) as well as four combinations of aluminum oxide, titanium oxide, zinc oxide, and copper oxide as insulators. The focusing of illuminating IR radiations by the integrated meta lens to the rectenna structure enhances its field-capturing characteristic by more than 400% as compared to conventional structures. In addition, the proposed design shows improved rectification properties in terms of better impedance matching and rectification efficiency, particularly for the best configuration of Au-Al2O3-Cu2O-Cu rectenna with added metasurface. Future applications of this study include the development of efficient IR energy harvesting systems for remote sensing, wireless communication, and other IoT devices.

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Full wave numerical analysis of wideband and high directive log spiralTHzphotoconductive antenna

Cited by 10 publications

References 29 publications

Plasmonic semiconductor nanogroove array enhanced broad spectral band millimetre and terahertz wave detection

Plasmonic semiconductor nanogroove array enhanced broad spectral band millimetre and terahertz wave detection

Design of a Novel Broadband Antenna for Photomixer Chips in the Terahertz Frequency Range

MIIM Rectenna with a Meta-lens for Enhanced IR Energy Scavenging at 28.3 THz

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