Design and implementation of a terahertz lens-antenna for a photonic integrated circuits based THz systems

Al-Daffaie, Shihab; Jumaah, Alaa; Rubio, Verónica Laín; Kusserow, Thomas

doi:10.1038/s41598-022-05338-0

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…Different tools such as mechanical polishing, hot pressing, 3D printing have been used for the development of the MPFLs as the discrete components of different low refractive index materials such as polymers, Teflon, polyamides, paraffins which possess small optical losses in the sub-THz frequency range [8]- [11]. All those materials and fabrication processes make bottle-neck for the developments at higher THz frequencies and for the integration of MPFLs on-chip with other THz devices [2], [3]. Researchers moved to higher frequencies by making use of the silicon (Si) with low absorption losses typical for many semiconductor crystals [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Multiphase Fresnel Lenses on Silicon Wafers for Terahertz Frequencies

Ayyagari

Indrišiūnas

Kašalynas

2023

IEEE Trans. THz Sci. Technol.

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The hybrid multi-phase Fresnel lenses (H-MPFLs) were developed on silicon (Si) wafer at the selected frequency of 585 GHz. For this reason, the design of a standard MPFL was modified thoroughly in various outer zone areas in order to reduce complexity and manufacturing time of the diffractive optical elements (DOEs) by employing the direct laser ablation (DLA) processes. The phase offset was found by a precise control over the phase shift of incoming radiation in steps of /12, revealing its optimal value to be of +/4 independently on the hybridization order of the lens, the focusing gain of which was found to be up to 10 % higher than that achieved with a standard design MPFL. The numerical modeling data were confirmed by experiments demonstrating the effective THz beam focusing with H-MPFL samples to the diffraction limited spot size. Proposed development procedure can be further modified by scaling the hybrid lens design to other frequencies with different zone numbers and/or by employing other materials suitable for THz photonics integration on-chip with the semiconductor devices.

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Section: Introductionmentioning

confidence: 99%

Hybrid Multiphase Fresnel Lenses on Silicon Wafers for Terahertz Frequencies

Ayyagari

Indrišiūnas

Kašalynas

2023

IEEE Trans. THz Sci. Technol.

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“…Over the preceding decades, optical lenses have become increasingly valuable from a commercial standpoint and are extensively utilized in diverse applications, including beam shaping 1 , antennas 2 , 3 , autonomous vehicles 4 , 5 , and virtual reality products 6 , 7 . Obtaining an optical lens system of superior quality necessitates a complex design process and extensive refinement, thus requiring substantial dedication of time and effort.…”

Section: Introductionmentioning

confidence: 99%

Inverse design of optical lenses enabled by generative flow-based invertible neural networks

Luo,

Lee

2023

Sci Rep

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Developing an optical geometric lens system in a conventional way involves substantial effort from designers to devise and assess the lens specifications. An expeditious and effortless acquisition of lens parameters satisfying the desired lens performance requirements can ease the workload by avoiding complex lens design process. In this study, we adopted the Glow, a generative flow model, which utilizes latent Gaussian variables to effectively tackle the issues of one-to-many mapping and information loss caused by dimensional disparities between high-dimensional lens structure parameters and low-dimensional performance metrics. We developed two lenses to tailor the vertical field of view and magnify the horizontal coverage range using two Glow-based invertible neural networks (INNs). By directly inputting the specified lens performance metrics into the proposed INNs, optimal inverse-designed lens specifications can be obtained efficiently with superb precision. The implementation of Glow-assisted INN approach is anticipated to significantly streamline the optical lens design workflows.

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Design and Analysis of Even-Positioned Cavity-Based Optical Amplification Device in Dielectric Metasurface

Rehman

Khan

Irfan

et al. 2023

2023 IX International Conference on Information Technology and Nanotechnology (ITNT)

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Recently, the development in the field of optical technology is exemplary, specifically relating to the design of the components necessary for optical integrated circuits. This research work investigates optical amplification action in a 2D Photonic Crystals (PhCs) structure with variable radius even-positioned PhC-cavity within its lattice. Two optical signals are used, first acting as data signals coupled into the optical structure using the phenomenon of the Guidedmode-resonances (GMR) and the second one as a pump signal index-guided into the optical structure. The pump signal is used to amplify the data signal and the PhC-cavity is used for spectral tuning of the device operating in near-infrared (NIR) range. The dielectric structure consists of an optical waveguide packed in between the substrate and a cladding layer. The design and analysis of the proposed device is performed in a Finite-Difference-Time-Domain (FDTD) based open-source software package. The investigated results present optical amplification for the radius of the PhC-cavity greater than the standard radius of the PhC-elements used in the structure.Moreover, as a concluded fact, PhC-cavity nearer to the symmetric point of the optical structure will greatly influence the amplification and tuning of the GMR modes. Therefore, the investigated device can be used in applications relating to optical transistors, filters, and integrated circuits.

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Design and implementation of a terahertz lens-antenna for a photonic integrated circuits based THz systems

Cited by 7 publications

References 13 publications

Hybrid Multiphase Fresnel Lenses on Silicon Wafers for Terahertz Frequencies

Hybrid Multiphase Fresnel Lenses on Silicon Wafers for Terahertz Frequencies

Inverse design of optical lenses enabled by generative flow-based invertible neural networks

Design and Analysis of Even-Positioned Cavity-Based Optical Amplification Device in Dielectric Metasurface

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