Publications de Amir Jafargholi

Machine-learning-empowered FDTD/FEM simulations for predictive solar energy absorption in plasmonic metamaterial nanocavity arrays

FDTD/FEM simulations, strengthened by machine learning, achieve 95.44% optical absorption efficiency in TiO 2 /TiN plasmonic nanocavities for solar energy harvesting. ...

Royal Society of Chemistry (RSC)2025

Aging analyses of transformer oil based on optical properties of LIF spectroscopy

Amir Jafargholi

Here, the real time pyrolysis characteristics, the degradation degree and the aging time of the transformer oil have been investigated using laser induced fluorescence (LIF) spectroscopy. The signal elevation up to four-fold and the lucid red shift up to 1 ...

PERGAMON-ELSEVIER SCIENCE LTD2025

Loop Antenna for Wi-Fi 6/6E Application

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper introduces a horizontally polarized, low-profile loop antenna. The antenna features a printed circular segmented loop loaded with capacitor varactors. By adjusting the capacitive varactors, the antenna has a broadband impedance bandwidth with a ...

Institute of Electrical and Electronics Engineers2025

Low-Profile Dual-Polarized SIW Slot Array Antenna for 5G Application

Romain Christophe Rémy Fleury, Amir Jafargholi

Decreasing the permittivity of a dielectric-loaded slotted waveguide antenna results in an increase in both impedance and radiation bandwidth, where the widest bandwidth can be achieved when the dielectric permittivity falls below unity. This concept is em ...

Institute of Electrical and Electronics Engineers2025

A Reconfigurable Pattern Loop Antenna for Wireless Applications

Romain Christophe Rémy Fleury, Amir Jafargholi

This letter presents a new low-profile, reconfigurable pattern antenna. The antenna features a printed circular segmented loop fed by two separate feed points coupled to a parasitic composite right/left-handed transmission line (CRLH TL). The key innovatio ...

Institute of Electrical and Electronics Engineers (IEEE)2025

SIW Slot Leaky-Wave Antenna Using Low-index Metamaterial

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper presents a wideband leaky-wave substrate-integrated waveguide (SIW) slot antenna. The proposed structure comprises slots loaded with a low-index metamaterial (MTM). The MTM is realized using an array of thin wires. Loading the antenna with low-i ...

Institute of Electrical and Electronics Engineers Inc.2024

Low-Profile ESPAR Using Metamaterial-Inspired Structure

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper addresses the 3D nature of traditional Electronically Steerable Parasitic Array Radiators (ESPARs). Additionally, the required distance between the main radiator and the parasitic elements usually affects the antenna's electrical size and the fr ...

2024

Optical properties of Makrofol under various alpha fluences

Amir Jafargholi

The optical properties of Makrofol samples are investigated under various fluences of alpha exposure (2 MeV at 5×102, 103, 5×103, 104, 5×104, 105, 5×105 and 106 alphas.cm2 alongside the unirradiated ones (pristine). Several analyses, including UV–visible, ...

2024

PC12 differentiation to neuron cells activated by a low-level laser at 660 nm on UV pre-treated CR-39 scaffolds with parallel microchannels

Amir Jafargholi

The lack of regeneration of injured neurons in the central and peripheral neural system leads to the failure of damaged tissue repair in patients. While there is no definitive cure for most neurodegenerative diseases, new therapeutic methods that cause the ...

2024

GPS Interference Cancellation Using Metamaterials

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper introduces a novel passive method and structure designed to mitigate unwanted interference at the antenna in conventional Global Positioning System (GPS) applications. In contrast to traditional approaches that typically utilize high-impedance s ...

Institute of Electrical and Electronics Engineers (IEEE)2024

Enabling Wide Bandwidth in Substrate-Integrated Waveguide Slot Antennas by Using Low-Index Metamaterials

Romain Christophe Rémy Fleury, Jalaledin Tayebpour, Amir Jafargholi

This paper presents a solution to overcome the inherently limited bandwidth of substrate-integrated waveguide (SIW) slot antennas. It is analytically shown that by decreasing the permittivity of a dielectric loaded slot antenna, the resulting bandwidth inc ...

American Physical Society (APS)2024

GPS Interference Cancellation Using Magneto-dielectric Metamaterials

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper presents a new method and structure to suppress unwanted interference in conventional Global Positioning System (GPS) applications. In contrast to traditional antennas that usually utilize high-impedance structures with limited enhancement or th ...

Institute of Electrical and Electronics Engineers Inc.2024

An elliptical nanoantenna array plasmonic metasurface for efficient solar energy harvesting

Amir Jafargholi

Plasmonic metasurfaces with subwavelength nanoantenna arrays have attracted much attention for their ability to control and manage optical properties. Solar absorbers are potential candidates for effectively converting photons into heat and electricity. Th ...

Royal Soc Chemistry2024

Dual-Polarized SIW Slot Antenna Using ENZ Metamaterial for 5G and mmWave Applications

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper presents a broadband dual-polarized substrate integrated waveguide (SIW) slot antenna. It is analytically shown that by decreasing the permittivity of a dielectricloaded slot antenna, the resulting bandwidth increases significantly, where the wi ...

IEEE2023