Mohammadmahdi Ariannejad

• Photonics engineering
• PhD at University of Malaya

Glucose monitoring is critical for diabetes management, yet traditional invasive methods remain fraught with discomfort and logistical challenges. Recent advancements in microwave-based microstrip line sensors offer a transformative alternative, leveraging electromagnetic interactions with biological tissues to detect glucose-induced dielectric cha...

Ensuring reliable and sustainable electricity access in remote rural communities remains a significant challenge, particularly in regions like Sarawak, Malaysia, where grid extension is often economically unfeasible due to difficult terrain and low population density. This study developed and optimized a hybrid PV/Hydro/DG/Battery energy system as...

The development of digital technologies has given rise to novel approaches to the problems facing contemporary agriculture. Digital Twin systems (DTS) are one of these technologies that have become an innovative tool in smart farming. DTS facilitates data-driven decision-making, predictive maintenance, and real-time monitoring by emulating actual f...

An investigation was made to detect the DNA samples of BALB/c rats, exploiting the technique of broadband plasmonic response in the visible spectral regime. In experiments, a non-coherent light beam was physically designed and practically implemented to study the spectral effect due to serial dilution of BALB/c rat’s dried DNA. In particular, three...

Harvesting energy from microwave frequency is one of the key areas of research in the past decade to provide an alternative power source for wireless devices and sensor networks. The increase in the employment of Internet of Things (IoT) devices as well as sensors in order to support technological advancement leads to an increase in the energy dema...

In today’s smart cities, the use of passive Radio-frequency Identification (RFID) tags gained popularity in access control, file tracking for healthcare, supply chain management in logistics, smart labels, vehicle tracking identification and others. The main advantages of using passive RFID tags are low cost and not requiring an internal power sour...

This study presents a proposed approach that is focused on two aspects of smart buildings (SBs), which are near or real-time measuring and monitoring of energy consumption and energy generated locally. The design proposed is a smart plug, which is the employment of a smart monitoring system that allows users to monitor various ordinary electrical a...

Nanometer scale power amplifiers (PA) at sub-THz suffer from severe parasitic effects that lead to experience limited maximum frequency and reduced power performance at the device transceiver front end. The integrated circuits researchers proposed different PA design architecture combinations at scaled down technologies to overcome these limitation...

With the rapid development of electronic technology and information technology, personal computer has gradually become the public's office or entertainment tools, which also makes the computer mouse a widely used tool. However, most computer mouse on the market today come with batteries. In this context, it is necessary to design a batteryless mous...

Since the coronavirus disease (COVID-19) began in 2020, it has changed the way people live such as social life and healthcare. One of the simplest ways to avoid wide spread of the virus is to minimize physical contact and avoid going to a crowded place. Besides that, it also has prompted countries across the world to employ digital technologies suc...

The spectral response of four Mach–Zehnder Interferometers (MZIs)-based silicon photonic circuits integrated with/without apodized corrugated waveguide gratings comprising common feature of two serially connected closed-loop interferometers (CLIs) was investigated theoretically and experimentally. These CLIs with serial connection naturally alter t...

Silicon photonic square-layout ring resonator-based circuits comprising Mach–Zehnder interferometers (MZIs), grating couplers, three-port splitters and combiners were designed, modeled, and fabricated for efficient control over the stop-band and pass-band filtering of transmission spectrum. It was found that exploiting square-layout rings and assig...

Over the past few decades, wind energy has emerged to be one of the most promising and popular sources of renewable energy in different continents. The efficiency and robustness of wind energy conversion systems are highly dependent on the safe operational status of the system and the capability to achieve cost-effective operation. In order to prol...

Artificial intelligence based maximum power point tracking (MPPT) techniques play an essential role in improving the efficiency of photovoltaic power conversion systems. Over the past few years, researchers around the world have proposed various nature-inspired metaheuristic optimization algorithms in order to extract the highest possible power fro...

The use of a newly designed silicon dumbbell-shaped micro-ring resonator-based device was conceptualised for sensing applications. In particular, an illustrative example of glucose monitoring was presented considering various values of its concentrations in deionized water. The device operates on the principle of field coupling in integrated optic...

A double-side polished fiber (DSPF) is fabricated for the passive generation of mode-locked pulses in an optical fiber ring cavity. The DSPF is made using a modified wheel polishing technique and coated with a cobalt oxide (Co3O4) solution as a saturable absorber (SA) to induce mode-locked operation by evanescent field interaction. The laser uses a...

In this work, a simple yet efficient method of growing magnetic binary metal oxides of CuO/Fe2O3 nanoparticles on reduced graphene oxide (rGO) sheets using the hydrothermal method was demonstrated. The rGO-CuO/Fe2O3 nanocomposite was characterized by X-ray diffraction (XRD), Raman, field emission scanning electron microscope (FESEM) and high-resolu...

This study investigates the use of silicon material as an optical waveguide for a subwavelength grating (SWG) design and micro-ring resonator structure under different conditions with CO2 as upper cladding. The CO2 was chosen to measure the sensitivity of the optical waveguide sensor, as it has a refractive index similar to air. The highest Qfactor...

This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal

A thulium–holmium fiber (THDF) laser cavity has been demonstrated with a SU-8 polymer microring resonator (PMRR) in the cavity. The PMRR has a 500μm radius and fabricated using the lithography method, with the SU-8 polymer acting as a host material. The butt coupling method was used for the horizontal coupling of light from a ultra-high numerical a...

Optical Racetrack resonator waveguide which is based on silicon material possesses a good ability in sensing different materials, and urea is one of them has been simulated using a Finite different time-domain (FDTD) method. The drop port of racetrack possessed a higher spectrum shift of 7 × 10⁻³ nm. Urea was considered as the upper cladding in the...

For modelling the nonlinear effect on the race track structure, the 2D, FDTD has been utilized to overcome the reliability of the results the var-FDTD has been considered using 2.5D algorithm. The nonlinearity effect can be described by χ³ which is cooperating with dispersion value of the material. The parameters have been studied such as Qfactor t...

The solar radiation can be absorbed by the material that can be deposited in thin film or the other way around. Si solar cell is one of the common products. Using different layers and different materials in the design of solar sell can increase the efficiency and decrease the cost. Different types of solar cell have been studied.

Copper tin sulfide (CTS) can be a very good material for solar cells as it is inexpensive and easy to fabricate; however, the efficiency may not be good enough. The bandgap of 0.9 eV can result in cell efficiency of 11.58%; however, the efficiency of the cell can be increased by increasing the bandgap value.

To understand the structure of a solar cell, the Solar Cell Capacitance Simulator (SCAPS) is used. Cell models can be predicted in the simulation so the efficiency can be improved by use of a different thickness or a different material. Copper tin sulfide (CTS) has been chosen as the material for this simulation. Different results can be obtained b...

Use of solar cells can save our environment. There is a lot of investment in renewable energy, mainly in solar cells, as they use only solar energy, which is inexpensive and easy to access. The principles of solar cells can help us to understand more about ways to design better and more efficient solar cells.

The SCAPS simulation has been used by implementing the CTS material. The effect of i-ZnO and its thickness was important to do the optimization. CdS can be a good buffer layer in this design. The effects of various layer thicknesses, different temperature of CTS as absorber layer, and different thickness of ZnO had been simulated.

A single mode optical fiber modified using side-polishing method is applied as a sensor based on surface plasmon resonance (SPR) principles. The SPR sensor was designed using side-polished optical fiber of which the cladding was symmetrically removed and coated with different thicknesses of embedded silver film. The amount of cladding removed was b...

A single mode optical fiber modified using side-polishing method is applied as a sensor based on surface plasmon resonance (SPR) principles. The SPR sensor was designed using side-polished optical fiber of which the cladding was symmetrically removed and coated with different thicknesses of embedded silver film. The amount of cladding removed was b...

Here we study and analyze the performance of a graphene-based photodetector integrated onto a silicon-on-insulator microring using optical and electrical simulations. The electrical simulation reveals the role of material interface losses and allows one to extract key behavioral parameters such as dark current, responsivity and bandwidth.

The feasibility of integrated SU-8 polymeric optical waveguides on a silicon platform was demonstrated experimentally and supported by simulation. Micro-ring resonator (MRR) configurations were designed and fabricated using SU-8 polymer. Simulation is carried out using the finite-difference time-domain method to improve the design. Both the simulat...

Finite-difference time domain (FDTD) simulation has been used for modeling of nonlinear optical interaction in a modified microring resonator as Panda structure. By proposing the Panda structure which has been modeled using both silicon and material (Chi2) with nonlinear effect, generation of four-wave mixing is feasible. Due to the nonlinear inter...

We proposed and investigated the use of a micro-ring resonator in an ion exchange waveguide as a gas/liquid sensor. The ion exchange process in an optical waveguide was simulated using IONEX software, where Ag⁺ ionic concentrations were deposited on glass substrates. Subsequently, a micro-ring resonator was designed on the ion exchange waveguide as...

This study is performed to investigate the temperature sensitivity of SU-8-based triple-arm Mach–Zehnder interferometer (MZI) and straight waveguide. The proposed SU-8 2000-based rib waveguides are fabricated on a silicon wafer with 1.5-μm SiO2 thermal oxide layer. SU-8 layer of desired thickness is spin-coated onto the silicon wafer followed by pa...

This paper presents the challenging issues in micro electro mechanical system (MEMS) packing technologies. The MEMS package includes a MEMS device and a signal conditioning electronic circuit. In one viewpoint, MEMS application is categorized by the type of sensor, actuator, and structure. MEMS technology applications in general domains are automot...

This work describes the polarization study in the optical micro ring resonator systems. The use of polymeric materials for micro ring resonator structures recently has gained major interests due to many advantages such as enabling a rapid and straightforward fabrication process. Here we report a demonstration of an optical micro ring resonators com...

We demonstrate a stable, tunable dual-wavelength (DW) generated by launching an in-house built supercontinuum (SC) into an add-drop microring resonator (MRR). The MRR is fabricated from a silicon-nitrogen-oxygen substrate. The frequency comb of the filtered SC is obtained with an experimental free spectral range (FSR) from 0.39 to 0.46 nm correspon...

The ion exchange creates the optical buried waveguides, whereas it is the method that the glass doping occurs with the condition of existence of the mobile metal ions. The most common ion used is silver (Ag+) due to its broad variation in the refractive index. The proposed application presented in this work is to use the microring resonator (MRR) s...

Sub-wavelength grating waveguide-based micro-ring resonators (SWGMRs) are interesting areas of photonics and optoelectronics application. The nature of high bending loss has constrained the SWGRM to achieve a small radius with the satisfied quality factor. In this work, we have demonstrated that the bend loss in SWG waveguide has been substantially...

A sensitivity enhanced optical temperature sensor has been investigated and developed based on a silicon oxynitride (SiON) waveguide microring resonator (MRR). The broadband supercontinuum (SC) output from a fiber laser cavity is injected into the input port of the MRR, where the output was detected at the drop port of MRR. The results can be usefu...

A three-dimensional (3-D) finite-difference-time-domain (FDTD) analysis was used to simulate a silicon photonic waveguide. We have calculated power and transmission of the graphene used as single or multilayers to study the light transmission behavior. A new technique has been developed to define the straight silicon waveguide integrated with grate...

This paper reports on an approach for fabrication of micro-channels with nanometer thickness achieved by optimization of UV lithography processes. Rectangular micro-channels with a staple edge are fabricated over the surface of a silicon wafer substrate in which a sub-micron layer of diluted SU-8 thin film has been coated. The optimization of the p...

In this work, simulation is conducted to investigate Ge photodetectors monolithically integrated on Si chip. The performance of vertical Germanium photodetector with FDTD Solutions (optical simulation) and electrical simulation has been studied. Selective heteroepitaxy of Ge is functioned in the monolithic integration of Ge photodetectors. The pote...

A high-sensitivity y-splitter, based on thermal ion-exchange waveguide has been studied for biochemical sensing platform applications. Based on the analysis, the ion-exchange waveguide has been simulated and designed by using the finite difference time domain method (FDTD). To realize high-resolution, y-splitter read-out configuration is investigat...

We present here the results of a simulation of the effect of gold and graphene coatings on silicon micro-ring resonators. We studied the effect of different radii of graphene on the time delay, from which one an interesting aspect of light pulse behaviors, such as fast light, was numerically investigated. The obtained results indicate that the time...

This paper reports the experimental application of the fabricated SU-8 based triple arm Mach-Zehnder interferometer (MZI) in the detection of graphene and graphene oxide. A standard MZI has two arms in its structure. In our design, we combine two MZIs with different dimensions together in a way that a short arm MZI replaces one longer arm of the la...

A simple high-resolution refractive index (RI) and phase sensor has been demonstrated and the results numerically verified. A free space gap is employed in one arm of a Mach–Zehnder interferometer (MZI) to serve as the sensing mechanism with a physical spacing of 1.4 mm. The propagation constant of transmitted light in the MZI’s gap changes due to...

Here we show a photonic design for tunable dual-wavelength generation deploying optical nonlinear mode coupling of two coupled III-V semiconductor microring resonators (MRRs) connected to a pump and drop waveguide buses. Here one of the two rings contains a grating, while the other has a planar surface. The underling mechanism for the dual waveleng...

This paper reports on an approach for fabrication of micro-channels with nanometer thickness achieved by optimization of UV lithography processes. Rectangular micro-channels with a staple edge are fabricated over the surface of a silicon wafer substrate in which a sub-micron layer of diluted SU-8 thin film has been coated. The optimization of the p...

This study highlights photoresponsivity property of hybrid-ZnO nanowires (ZnO NWs) photodetector to a white LED source with a wavelength range of 400 – 700 nm. The use of methanol via the vapor phase transport (VPT) method was utilized to achieve incorporation of carbon and oxygen particles with Zn to form hybrid-ZnO NWs. Field emission scanning el...

Silver ion-exchange in the glass reveals to be a highly promising method if the low loss waveguide fabrication in the context of optical interconnects demanded. Silver ion-exchange is a well-known method that Ag⁺-ions from the AgNO3 melt exchanged with mixed Na⁺-ions of the glass, even not high-temperature low solubility of the elementary silver ca...

Mode-locked generation of erbium-doped fiber laser (EDFL) with hybrid zinc oxide/graphene oxide (ZnO/GO) thin film as saturable absorber (SA) is proposed and practically demonstrated. The SA shows the modulation depth of 18.69% and it has been sandwiched between the fiber ferrules. Mode-locked pulse occurred at pump power of 14.8 mW and by varying...

A system of Microring Resonator (MRR) based the comb-like sensor devices has been simulated. We present a Silicon-On-Insulator (SOI) ring resonator based on refractive index sensor. The novelty of the architecture lies in the capability to sense the shifts of multiple peaks simultaneously with an MRR waveguide. The behavior of optical MRRs, especia...

Add-drop microring resonators (MRRs) are used in a wide variety of practical applications. To add or drop special wavelength division multiplexing, an optical wavelength selective ring resonator can be used. This paper presents a system of multiple mode lock lasers consisting of an add-drop MRR integrated into a smaller ring with a saturable absorb...

This report makes a comparison between the spectrum features of plasmonic metamaterial (metal-insulator-conductor) MIC sensor with a monolayer of graphene and another MIC sensor with a multilayer of graphite as the back reflector. In both structures the silicon substrate as an insulator layer sandwiched between sub-wavelength periodic nano gold con...

Microring Resonator (MRR) system is utilized to generate comb signal including eight carriers, owing 10 GHz free spectral range (FSR) to be applied in wavelength-division multiplexing (WDM) systems. Applying multiband (MB) approach, the ultra-high spectral effective orthogonal frequency-division multiplexing (OFDM) technology is utilized to modulat...

This work examines the performance of the Cu2SnS3 (CTS) solar cells using the solar cell capacitance simulator (SCAPS) approach. The performance of the CTS solar cell was evaluated in terms of (Formula presented.), (Formula presented.), fill factor and efficiency. The structural parameter variation of CTS solar cell has been studied in terms of buf...

Ion exchange in glass and key developments in the first years of research are briefly described. Ion exchange in glass is a well-established method for fabrication of passive and active integrated photonic devices. An overview of fabrication, characterization and modeling of waveguides is given and the most important waveguide devices and their appli...

Optical interconnects are expected to complement or even replace electrical interconnects for shorter and shorter distances, as they allow for large data transmission rates as well as very high link densities. An attractive way to implement optical interconnects in modern multiprocessor systems is to integrate an optical waveguide layer into conven...

We investigate the role of one subwavelength-size grating of silver as a reflector at different angular positions of InAs-based subwavelength grating (SWG) and non-SWG microring resonators for the application of a femtosecond time delayer. The usage of one silver grate as a reflector basically imposes high loss to the generated peaks of transmittin...

We investigate the role of one subwavelength-size grating of silver as a reflector at different angular position of InAs based sub-wavelength grating (SWG) and non-SWG micro ring resonators for the application of femtosecond time delayer. The usage of one silver grate as a reflector basically imposes high loss to the generated peaks of transmitting...

Optical wireless communications (OWC) using soliton pulses in the visible range (600 nm) has been presented. The filtering the input Gaussian spectrum is performed via the microring resonators (MRRs), where the range of 499.25 THz to 500.05 THz frequency band could be generated. The MRRs are simulated using InGaAsP/InP semiconductor with InGaAsP co...

In-line single-mode tapered-fiber Mach-Zehnder interferometer (MZI-SMTF) with average waist diameters (davg) of 4.05 and 2.89 μ m have been fabricated, and both the temperature and the humidity sensitivity of the surrounding media have been measured and compared. The humidity and the temperature were measured over the ranges from 0% to 90% and 28 °...

In this research, we use the time-domain travelling wave (TDTW) method to model and simulate a microring resonator (InGaAsP/InP) waveguide based on resonance wavelength shifts. A change of the refractive index of the cladding results in a change of the effective index of the mode propagating within the microring resonator, where it can be observed...

Analysis of a coupled microring resonators (CMRR) system made of InGaAsP/InP semiconductor is presented. This analysis exploited the time-domain travelling wave (TDTW) method in order to model the transfer function of the passive CMRR, and incorporated modeling of both passive and active MRRs filters wherein such filters are mostly characterized by...

Chaotic signal generation from microring resonators (MRRs) is presented. Two 1.5 µm Gaussians with spectral profile having powers of 600 mW are input into the system of MRRs. Using nonlinear conditions, the chaotic signals can be generated and propagated within the ring medium. Results show that the chaotic signals can be controlled and manipulated...

Atomic force microscopy nanolithography (AFM) is a strong fabrication method for micro and nano structure due to its high spatial resolution and positioning abilities. Mixing AFM nanolithography with advantage of silicon-on-insulator (SOI) technology provides the opportunity to achieve more reliable Si nanostructures. In this letter, we try to inve...

Low power and low area Static Random Access Memory (SRAM) is essential for System on Chip (SoC) technology. Dual-Port (DP) SRAM greatly reduces the power consumption by full current-mode techniques for read/write operation and the area by using Single-Port (SP) cell. An 8 bit DP-SRAM is proposed in this study. Negative bit-line technique during wri...

Low power and low area Static Random Access Memory (SRAM) is essential for System onChip (SoC) technology. Dual-Port (DP) SRAM greatly reduces the power consumption by full current-mode techniques for read/write operation and the area by using Single-Port (SP) cell. An 8 bit DP-SRAM is proposed in this study. Negative bit-line technique during writ...

Complementary Metal Oxide Semiconductor (CMOS) Image Sensors technology since their innovation has been changed a lot. Previously, CMOS technology was not so powerful to be considered as the competitor with couple charged devices. However, current CMOS Image Sensors (CIS) gain a huge market share by offering many advantages such as lower voltage op...

Complementary Metal Oxide Semiconductor (CMOS) Image Sensors technology since their innovation has been changed a lot. Previously, CMOS technology was not so powerful to be considered as the competitor with couple charged devices. However, current CMOS Image Sensors (CIS) gain a huge market share by offering many advantages such as lower voltage op...