Article
Physics, Applied
Angel Andueza, Jesus Perez-Conde, Joaquin Sevilla
Summary: During the last decades, 2D-ordered and disordered photonic systems have been heavily researched due to their ability to control and modify light flow. These systems can localize light into a bandgap by exciting states from cavities, defects, or photonic molecules. A controllable random disordered photonic system composed of silicon dielectric cylinders, exhibiting a deep bandgap and two tunable resonant states generated from embedded decagonal ring resonators, has been reported. These resonant states demonstrate high transmission intensity and a stable bandwidth even when the system's geometrical parameters are modified for frequency tuning. The ability to tune resonating frequencies with the system's geometrical parameters enables interesting applications such as sensing and filtering.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Crystallography
Mike P. C. Taverne, Ying-Lung D. Ho, John G. Rarity
Summary: Three-dimensional dielectric optical crystals with a high index can trap light in low-index defect cavities, leading to strongly enhanced local fields. By optimizing the bandgap and studying different defect shapes, researchers have achieved cavity modes with extremely small normalized mode volumes and long storage times.
Article
Engineering, Electrical & Electronic
Georgios D. Kolezas, Grigorios P. Zouros, Gerasimos K. Pagiatakis, John A. Roumeliotis
Summary: The article introduces the concept of all-anisotropic spheroidal photonic antennas and develops a rigorous theory for electromagnetic scattering by anisotropic spheroids. The theory is validated through comparisons with commercial software and a general purpose method. Geometrical tailoring can optimize the performance of nanoantennas, and the use of anisotropic materials enables setting the optimum state at smaller wavelengths.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Review
Optics
Wei Ma, Zhaocheng Liu, Zhaxylyk A. Kudyshev, Alexandra Boltasseva, Wenshan Cai, Yongmin Liu
Summary: Innovative approaches and tools, particularly deep learning, are shaping the field of photonics by offering efficient means to design photonic structures and providing data-driven solutions complementary to traditional physics-based methods. The progress in deep-learning-based photonic design is promising, with various model architectures showing potential applications in specific photonic tasks.
Article
Engineering, Civil
Xiyue An, Xinfeng Yuan, Hualin Fan
Summary: This paper innovatively constructs a meta-Kagome lattice (MKL) structure with broadband vibration isolation performance by using one-dimensional (1D) phononic crystal (PC) beams as the components. Three kinds of MKL structures with different pyramid shapes are designed and their vibration transmission properties are studied. The influence of skin characteristics on the vibration isolation performance of sandwich structures composed of MKL cores is also discussed. This work provides a new method for developing 3D multi-functional lattice structures, especially for load-bearing and vibration reduction.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
F. Demore, G. Rizzi, M. Collet, P. Neff, A. Madeo
Summary: This paper presents a unit cell that exhibits a band-gap in the lower acoustic domain, and confirms its viability through manufacturing and experimental tests. The introduction of a micromorphic model allows for focusing elastic energy, enabling the optimization of complex structures. This opens up new possibilities in metastructural design.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Physics, Applied
Wenze Lan, Peng Fu, Chang-Yin Ji, Gang Wang, Yugui Yao, Changzhi Gu, Baoli Liu
Summary: The key features of photonic band structures can be experimentally achieved by polarization- and momentum-resolved photoluminescence spectroscopy, providing a simple and effective approach for exploring topological photonics and other intriguing phenomena hidden in the photonic crystal slabs.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Ting Yu Teo, Nanxi Li, Landobasa Y. M. Tobing, Amy Sen Kay Tong, Doris Keh Ting Ng, Zhihao Ren, Chengkuo Lee, Lennon Yao Ting Lee, Robert E. Simpson
Summary: This study demonstrates the influence of (ZnS)(0.8-)(SiO2)(0.2) capping layers on the performance of Sb2S3 and Ag-doped Sb2S3 integrated photonic devices. At least 30 nm of capping material is necessary to protect the material from sulfur loss. The capping layer can be used to tune the PCM crystallization temperature and reduce device footprint.
Article
Chemistry, Multidisciplinary
Buse Aktas, Yashraj S. Narang, Nikolaos Vasios, Katia Bertoldi, Robert D. Howe
Summary: Jamming is a structural phenomenon that provides tunable mechanical behavior by increasing kinematic and frictional coupling under pressure gradients, leading to altered mechanical properties. Engineers have utilized jamming to build various devices and this study offers a framework for designing jamming structures, comparing force-deflection behavior of different types and introducing methods to expand design space. Parameters for designing, fabricating, and actuating jamming structures are described along with their effects on functional metrics.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Computer Science, Information Systems
Inzamam Ahmad, Sadiq Ullah, Shakir Ullah, Usman Habib, Sarosh Ahmad, Adnan Ghaffar, Mohammad Alibakhshikenari, Salahuddin Khan, Ernesto Limiti
Summary: This study introduces a novel antenna for THz frequency range applications, designed based on PBG crystal polyimide substrate, with high gain and low VSWR. It was found that adjusting the dimensions of the PBG unit cells can achieve a wider bandwidth.
Article
Chemistry, Multidisciplinary
Kiumars Aryana, Hyun Jung Kim, Cosmin-Constantin Popescu, Steven Vitale, Hyung Bin Bae, Taewoo Lee, Tian Gu, Juejun Hu
Summary: Reconfigurable or programmable photonic devices have become integral in optical systems and play a crucial role in applications ranging from data communication to space exploration. Chalcogenide-based phase-change materials have shown promise in reconfigurable photonics due to their large optical contrast. This paper highlights three important aspects that impact the thermal and phase transition behavior of these devices: enthalpy of fusion, heat capacity change upon glass transition, and thermal conductivity of liquid-phase PCMs. The findings offer insights for accurate modeling and development of more efficient reconfigurable optics.
Article
Engineering, Electrical & Electronic
Po-Han Chang, Charles Lin, Amr S. Helmy
Summary: This work proposes leveraging anisotropy in 2D materials to tailor modal fields in 2D material waveguides for the first time, improving efficiency of coupling-based photonic functions and expanding device capabilities. By regulating material absorption, modal fields of 2D modes can be tailored to localize around the waveguide center, enabling the implementation of 2D plasmonic circuits without relying on 3D layers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Russell Mahmood, Alma Vela Ramirez, Andrew C. Hillier
Summary: The study demonstrates the use of laser interference lithography (LIL) to create complex two-dimensional quasicrystal lattices, superlattices, and Moire lattices by utilizing multiple exposures and different interference pitch values. The structures were characterized and compared to model results to show their increased complexity and performance.
ACS APPLIED NANO MATERIALS
(2021)
Article
Optics
Fariborz Parandin, Saeed Olyaee, Reza Kamarian, Mohamadreza Jomour
Summary: This paper designs and simulates an optical comparator based on a photonic crystal, which has a small-sized structure and a high difference between logical values 0 and 1. It is suitable for photonic integrated circuits with high accuracy.
Article
Optics
Abraham M. Berman Bradley, William Tuxbury, Tsampikos Kottos
Summary: We investigated the emission characteristics of a tri-atomic photonic meta-molecule with asymmetric intra-modal couplings. By analyzing the dynamics of the discharged radiation, we identified a parameter domain where its directional re-emission properties are optimal.
Article
Engineering, Electrical & Electronic
Lingasamy Veluchamy, Krishnasamy T. Selvan, Rajeev Jyoti, Sagi Sravan Kumar
Summary: This paper presents the design and experimental evaluation of two wideband reflectarray antennas in the X-Ku band. One reflectarray, using concentric square ring-based elements, achieves a 2.5-dB gain bandwidth of approximately 46.2%, while the other reflectarray, using circular ring-based elements, achieves a 2.5-dB gain bandwidth of approximately 14.5%. Both reflectarrays exhibit low cross-polarization levels below -35 dB.
IETE JOURNAL OF RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Ronak Vashi, Trushit Upadhyaya, Arpan Desai
Summary: This paper proposes a semi-flexible 2 x 1 array antenna with epoxy glass fiber and graphene as patch and ground, respectively. The antenna incorporates a microstrip patch antenna with a center parasitic patch and slot in the radiating patch for bandwidth enhancement. The antenna has a wide operating frequency range and satisfactory gain values, making it suitable for WLAN and smart wireless devices applications.
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Upesh Patel, Trushit Upadhyaya, Arpan Desai, Rajat Pandey, Killol Pandya
Summary: This article presents a fractal antenna inspired by split-ring resonators for GSM and sub-6-GHz 5G applications. The antenna uses a unique geometry implemented on a low-cost substrate. Experimental results show that the antenna performs well in dual-frequency bands from 1.75 to 2.0 GHz and 3.01 to 4.18 GHz.
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2022)
Article
Chemistry, Multidisciplinary
Said Mosbah, Chemseddine Zebiri, Djamel Sayad, Issa Elfergani, Mohamed Lamine Bouknia, Samira Mekki, Rami Zegadi, Merih Palandoken, Jonathan Rodriguez, Raed A. Abd-Alhameed
Summary: The design of a highly sensitive microwave sensor based on CSRR for liquid characterization is presented in this paper. The sensor design involves a resonating structure printed on a microstrip-fed rectangular patch on a Roger RO3035 substrate and a CSRR etched on the ground plane. By placing the liquid sample in a capillary glass tube parallel to the sensor surface, the design achieves twice the efficiency in sensitivity and Q factor compared to a normal design. Bending the structure can further enhance design performance, leading to a 10-fold improvement in sensitivity compared to a flat structure.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Information Systems
Arpan Desai, Merih Palandoken, Issa Elfergani, Ismail Akdag, Chemseddine Zebiri, Joaquim Bastos, Jonathan Rodriguez, Raed A. Abd-Alhameed
Summary: In this paper, a transparent dual-port multiple-input multiple-output (MIMO) antenna operating in the sub-6 GHz 5G band is proposed. The antenna is designed using transparent conductive oxide and a transparent Plexiglas substrate, with two circular-shaped radiating elements fed by a microstrip feedline. The isolation mechanism and diversity parameters are analyzed. The experimental results show that the transparent MIMO antenna has satisfactory gain and efficiency, making it suitable for smart IoT devices.
Article
Computer Science, Information Systems
Aysu Belen, Filiz Gunes, Merih Palandoken, Ozlem Tari, Mehmet A. Belen, Peyman Mahouti
Summary: This paper presents a design and optimization method for a microstrip elliptic traveling wave antenna (TWA) for beam scanning in the X-band. A novel Modified Multi-Layer Perceptron (M2LP) algorithm is utilized for fast and accurate modeling, compared to other algorithms. The Latin-Hyper Cube Sampling (LHS) method is used to obtain training and test data, and the Invasive Weed Optimization (IWO) algorithm is applied to determine the optimal design parameters. The optimized TWA model shows superior performance in terms of physical size, frequency range, and radiation characteristics.
Article
Computer Science, Information Systems
C. Zebiri, M. L. Bouknia, D. Sayad, I Elfergani, Preecha Yupapin, M. Matin, Arpan Desai, Merih Palandoken, A. Iqbal, J. Rodriguez
Summary: With the advancement of material science, the understanding of the intrinsic properties of materials, such as chiral and metamaterials, has been transformed. This study investigates the bianisotropic Tellegen medium as a substrate for a printed dipole antenna, revealing the influence of its magnetoelectric elements on the input impedance of the dipole antenna.
Article
Computer Science, Information Systems
Ismail Akdag, Cem Gocen, Merih Palandoken, Adnan Kaya
Summary: In this article, a novel UHF RFID reader antenna is proposed and experimentally investigated. The antenna design consists of three layers, achieving excellent RF performance and demonstrating its technical potential in RFID-based wireless networks.
Article
Engineering, Electrical & Electronic
Trushit Upadhyaya, Ikmo Park, Rajat Pandey, Upesh Patel, Killol Pandya, Arpan Desai, Jayesh Pabari, Gangil Byun, Yogeshwar Kosta
Summary: This article introduces a designed four-port dielectric resonator-based connected ground multiple-input multiple-output (MIMO) antenna, which has dual-band operation and good isolation performance, suitable for Sub-6 GHz 5G and WLAN communication applications.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Analytical
Upesh Patel, Trushit Upadhyaya
Summary: This paper presents a four-port dielectric resonator-based multiple-input multiple-output (MIMO) antenna for sub-6 GHz MIMO communication. The antenna achieves dual-band resonance through aperture feeding and has a port isolation higher than 20 dB without an extra isolation mechanism. Full-wave high-frequency simulation software is used for simulation computation. The antenna exhibits a peak gain and efficiency at the target frequencies and the proposed resonator has good MIMO diversity parameters.
Article
Engineering, Electrical & Electronic
Md. Ahsan Halimi, Taimoor Khan, Merih Palandoken, Ahmed A. A. Kishk, Yahia M. M. Antar
Summary: RF-based wireless energy harvesting (WEH) and wireless power transfer (WPT) are being recognized for their ability to power a variety of sensors and devices. WEH enables low-power devices to be wirelessly powered by capturing ambient RF energy, while WPT provides the necessary power for high-power devices through intentional RF sources.
IEEE MICROWAVE MAGAZINE
(2023)
Article
Chemistry, Analytical
Ahmed Jamal Abdullah Al-Gburi, Norhanani Abd Rahman, Zahriladha Zakaria, Merih Palandoken
Summary: This article presents the design, fabrication, and measurement of a triple-rings complementary split-ring resonator (CSRR) microwave sensor for detecting semi-solid materials. The sensor operates at 2.5 GHz in transmission mode and shows high sensitivity for Di-water and Turmeric samples. The incorporation of a defective ground structure (DGS) improves the performance of the sensor in microstrip circuits, resulting in a high Q-factor magnitude.
Article
Computer Science, Information Systems
Meltem Tekcin, Merih Palandoken, Senem Kursun
Summary: In this study, a wearable textile RFID sensor for detecting wetness has been developed and tested. The sensor showed reliable performance in detecting wetness states and can be integrated into remote health monitoring systems.
Article
Computer Science, Information Systems
Ahmed Jamal Abdullah Al-Gburi, Zahriladha Zakaria, Merih Palandoken, Imran Mohd Ibrahim, A. A. Althuwayb, Sarosh Ahmad, Samir Salem Al-Bawri
Summary: This article introduces a compact ultrawideband (UWB) planar monopole antenna for small Internet of Things (IoT) applications. The antenna is printed on Roger RT/5880 substrate and has a total electrical size of 0.19 lambda(o) x 0.215 lambda(o) x 0.0196 lambda(o) with overall physical dimensions of 15 mm x 17 mm x 1.548 mm. It achieves optimum impedance matching through a linearly tapered microstrip line on a partially structured ground plane.
CMC-COMPUTERS MATERIALS & CONTINUA
(2022)
Article
Engineering, Electrical & Electronic
Trushit Upadhyaya, Rajat Pandey, Upesh Patel, Killol Pandya, Arpan Desai, Riki Patel, Yogeshwar Kosta
Summary: This study investigates the radiation characteristics of a multilayer antenna with an embedment of lefthanded material. By modifying the physical parameters of the negative refractive index resonator, the antenna radiation property can be altered, leading to significant impacts on antenna parameters such as resonance and gain.
PROGRESS IN ELECTROMAGNETICS RESEARCH M
(2022)
