88 citations · 323 across the 28 of their papers we have counts for
29 papers
A single metagrating metastructure for wave-based parallel analog computing
Hamid Rajabalipanah, Ali Momeni, Mahdi Rahmanzadeh +2
Wave-based signal processing has witnessed a significant expansion of interest in a variety of science and engineering disciplines, as it provides new opportunities for achieving h…
Reciprocal Metasurfaces for On-axis Reflective Optical Computing
Ali Momeni, Hamid Rajabalipanah, Mahdi Rahmanzadeh +4
Analog computing has emerged as a promising candidate for real-time and parallel continuous data processing. This paper presents a reciprocal way for realizing asymmetric optical t…
Ultrathin carpet cloak enabled by infinitely anisotropic medium
Mohammad Hosein Fakheri, Ali Abdolali
Thanks to the pioneering studies conducted on the fields of transformation optics (TO) and metasurfaces, many unprecedented devices such as invisibility cloaks have been recently r…
Analytical Design for Full-space Spatial Power Dividers Using Metagratings
Hamid Rajabalipanah, Ali Abdolali
We present a rigorous theoretical framework for designing full-space spatial power dividers using metagratings. In our study, the current restrictions of spatial power dividing pla…
Graphene-assisted metagrating: from coherent to angular-asymmetric control of absorption and reflection
Ensiye Ghorbanpour, Sahar Behroozinia, Ali Abdolali
In this paper, we exploit the metagrating paradigm to achieve coherent control of absorption and reflection in a two-port device. Employing graphene ribbon as a tunable element all…
Multifocal Terahertz Lens with Adjustable Focal Points
Ali Abdolali, Roya Kargar, Kasra Rouhi
The conventional lens's tunability drawback always restricts their application compared to the metasurface lens (metalens). On the other side, reconfigurable metalenses offer the b…
EEGsig: an open-source machine learning-based toolbox for EEG signal processing
Fardin Ghorbani, Javad Shabanpour, Sepideh Monjezi +3
In the quest to realize a comprehensive EEG signal processing framework, in this paper, we demonstrate a toolbox and graphic user interface, EEGsig, for the full process of EEG sig…
Broadband Tunable Terahertz Polarization Converter based on Graphene-shaped Metasurfaces
Behnaz Bakhtiari, Homayoon Oraizi, Ali Abdolali
In this paper, a broadband tunable polarization converter based on graphene metasurfaces is proposed. This polarization converter works in the terahertz (THz) frequency region, usi…
Scattering-free routing of surface plasmon polariton waves with optical null medium
Ali Abdolali, Atefeh Ashrafian, Hooman Barati Sedeh +1
Recently, guiding electromagnetic surface waves without sacrificing scattering losses through paths that have arbitrary shape bumps has gained a lot of interest due to its wealth o…
Time-modulated Measurements: Material Characterization Based on Scalar Reflection Data
Sepideh Ghasemi, Hamid Rajabalipanah, Majid Tayarani +2
This paper explores the time-modulated waveguide setups for unique and accurate permittivity and permeability extraction of lossy dispersive samples with phase-less measurements. W…
Parallel Optical Computing Based on MIMO Metasurface Processors with Asymmetric Optical Response
Amirhossein Babaee, Ali Momeni, Ali Abdolali +1
We present a polarization-insensitive metasurface processor to perform spatial asymmetric filtering of an incident optical beam, thereby allowing for real-time parallel optical pro…
Development of a Flexible Coupling Framework for Coastal Inundation Studies
Saeed Moghimi, Andre van der Westhuysen, Ali Abdolali +6
To enable flexible model coupling in coastal inundation studies, a coupling framework based on ESMF/NUOPC technology under a common modeling framework called the NOAA Environmental…
Electromechanically Programmable Space-Time-Coding Digital Acoustic Metasurfaces
Hamid Rajabalipanah, Mohammad Hosein Fakheri, Ali Abdolali
Over the last couple of years, the digital coding acoustic metasurfaces have been developed rapidly as a highly active research area for their unique and flexible manipulation of a…
How Do Space-Time Digital Metasurfaces Serve to Perform Analog Signal Processing?
Hamid Rajabalipanah, Ali Abdolali, Shahid Iqbal +2
In the quest to realize analog signal processing using sub-wavelength metasurfaces, in this paper, we demonstrate the first experimental demonstration of programmable time-modulate…
Wideband THz Low-Scattering Surface Based on Combination of Diffusion and Absorption
Kasra Rouhi, Ali Abdolali, Susan Fallah
In this paper, a wideband and low-scattering metasurface in terahertz (THz) is introduced. The proposed coding metasurface is composed of four different graphene square patches in…
Thermal-null medium (TNM): a novel material to achieve feasible thermodynamics devices beyond conventional challenges
Hooman Barati Sedeh, Mohammad Hosein Fakheri, Ali Abdolali +1
Recently, heat manipulation has gained the attention of scientific community due to its several applications. In this letter, based on transformation thermodynamic (TT) methodology…
Real-time Terahertz Wave Channeling via Multifunctional Metagratings: A Sparse Array of All-Graphene Scatterers
Sahar Behroozinia, Hamid Rajabalipanah, Ali Abdolali
Acquiring full control over a large number of diffraction orders can be strongly attractive in the case of realizing multifunctional devices such as multichannel reflectors. Recent…
Omnidirectional perfect acoustic cloak realized by homogeneous materials
Mohammad Hosein Fakheri, Hooman Barati sedeh, Ali Abdolali
Acoustic cloaks derived by coordinate transformation have opened up a new field of considerable interest in the last two decades. However, since perfect omnidirectional acoustic cl…
Self-biased Tri-state Power-Multiplexed Digital Metasurface Operating at Microwave Frequencies
Mehdi Kiani, Majid Tayarani, Ali Momeni +2
Exploiting of nonlinearity has opened doors into undiscovered areas for achieving multiplexed performances in recent years. Although efforts have been made to obtain diverse nonlin…
Tunable Multifocal THz Metalens Based on Metal-Insulator Transition of VO2 Film
Roya Kargar, Kasra Rouhi, Ali Abdolali
Recently, metalenses which consist of metasurface arrays, have attracted attention due to their more condensed size in comparison with conventional lenses. In this paper, we propos…
Illusion Mechanisms with Cylindrical Metasurfaces: A General Synthesis Approach
Mahdi Safari, Hamidreza Kazemi, Ali Abdolali +2
We explore the use of cylindrical metasurfaces in providing several illusion mechanisms including scattering cancellation and creating fictitious line sources. We present the gener…
Non-Closed Acoustic Cloak Enabled by Sequential-Step Linear Coordinate Transformations
Zahra Basiri, Mohammad Hosein Fakheri, Ali Abdolali
Hitherto acoustic cloaking devices, which conceal objects externally, have depended on the objects' characteristics. Despite previous works, we design cloaking device placed neighb…
Asymmetric Metal-dielectric Meta-cylinders and their Potential Applications from Engineering Scattering Patterns to Spatial Optical Signal Processing
Ali Momeni, Mahdi Safari, Ali Abdolali +2
We propose a novel type of bi-anisotropic hybrid metal-dielectric structure comprising dielectric and metallic cylindrical wedges wherein the composite meta-cylinder enables advanc…
Geometry free materials enabled by transformation optics for enhancing the intensity of electromagnetic waves in an arbitrary domain
Ali Abdolali, Hooman Barati Sedeh, Mohammad Hosein Fakheri
The concentration of electromagnetic waves (EM) is of utmost importance in many engineering applications such as solar-cells. According to the transformation optics (TO) methodolog…