Samiye Matloub

University of Tabriz · Faculty of Electrical and Computer Engineering

Nowadays, there is a great interest in discovering alternative approaches to reduce the cost per the output power of first generation crystalline silicon solar cells. Light propagation in solar cells is controlled by interaction between periodic structure filters and light. Therefore, designing ultrathin solar cells in which light is trapped in the...

In this paper, a dual-concentric-core photonic quasicrystal fiber (DCC–PQF) with a 12-fold symmetric structure has been designed to compensate for dispersion effects. To this end, a new design based on modifying the positions of the nearest air holes to the central core has been proposed for dispersion compensation, in which ultra-high negative dis...

A band pass THz filter has been presented by the aid of coupling between the waveguides and ring resonator based on metallic photonic crystal slab. The rows of rods are missed and remaining rods in the rows play as a reflector then the position of central rods are rearranged as a ring, the radius of reflector rods and ring resonator is modified in...

Superior stability is exhibited by hole transport layer (HTL)-free carbon-based perovskite solar cells (C-PSCs) compared to their HTL-equipped counterparts due to the elimination of the HTL layer and metal contact. However, a lower power conversion efficiency (PCE) is observed in these cells. The PCE of the PSCs is primarily determined by the absor...

This study investigates a carbon-based all-perovskite tandem solar cell (AP-TSC) with the structure ITO, SnO₂, Cs₀.₂FA₀.₈Pb(I₀.₇Br₀.₃)₃, WS₂, MoO₃, ITO, C₆₀, MAPb₀.₅Sn₀.₅I₃, PEDOT: PSS, Carbon. The bandgap configuration of the cell is 1.75 eV/1.17 eV, which is theoretically limited to 36% efficiency. The effectiveness of embedding cubic plasmonic m...

Perovskite solar cells have emerged as a promising third-generation solar cell technology, characterized by high efficiency and low fabrication costs, garnering significant research attention in recent years. In this study, the impact of embedding the cluster of cubic plasmonic nanoparticles within the ultra-thin absorber layer of perovskite solar...

This report paves the way for low cost, multi-color, room-temperature, and easily-feasible mid-IR photodetector with distinct output currents. The proposed device is designed and simulated to be fabricated by the solution-process technology thanks to its simplicity and fabrication ease, room-temperature operation capability, low production cost, an...

Carbon-based perovskite solar cells (C-PSCs) have gained attention due to their cost-saving, achieved by eliminating expenses associated with organic materials, hole transport layers (HTL), and metallic contacts. Furthermore, they exhibit improved stability compared to counterparts utilizing HTL/metallic contact interfaces. However, the power conve...

All-optical semiconductor optical amplifiers (SOAs) present a cost-effective and highly efficient solution for long-distance WDM networks. In this study, the investigation of a dual-wavelength all-optical SOA incorporating two distinct sizes of solution-processed InAs/AlAs core/shell quantum dots (QDs), operating at 1.31 and 1.55 μm wavelengths,...

In the context of advancing photonics technologies, there is an increasing demand for broadband and ultrafast optical modulators to support next-generation telecommunication networks and ultrafast quantum information processing. Existing modulators are limited by their inability to efficiently handle multiple channels, leading to challenges in high...

Terahertz (THz) band is an important range in photonics, and provides numerous advantages in various applications. One of the most popular detection methods for THz pulses is electro-optic sampling (EOS). EOS provides many benefits; however, in this method distortion damages the output signal, and limits the bandwidth of this technique. In this art...

This work demonstrates the enhancement of the power conversion efficiency of thin film organic-inorganic halide perovskites solar cells by embedding triple-core-shell spherical plasmonic nanoparticles into the absorber layer. A dielectric-metal-dielectric nanoparticle can be substituted for embedded metallic nanoparticles in the absorbing layer to...

Recently, thin-film organic–inorganic hybrid perovskite solar cells have a high efficiency-to-cost ratio. However, due to the thickness of the absorber layer, photon management in the absorber layer is still not optimized. This research suggests an embedded side for the plasmonic perovskite solar cells. Using Maxwell equations solver (finite-differ...

Recently, all-optical modulators are potentially the most promising candidate to achieve high-bit rate modulation in high-speed all-optical communication technologies and signal processing. In this study, a two-channel all-optical modulator based on a solution-processed quantum dot structure is introduced for two sizes of quantum dots to operate at...

In this paper, an approach is proposed for an ultra-broadband quantum dot (QD) reflective semiconductor optical amplifier using superimposed QDs with switching and band selection capability in the supported band. Furthermore, about 1 µm optical bandwidth is covered (O, E, S, C, and L bands), which is the desired region in most optical communication...

In this paper, for the first time, a highly ultra-broadband QD-SOA based on superimposed Quantum Dots has been proposed to accomplish a broader optical gain spectra range of almost 3.5 µm from blue to Mid-infrared, considering solution-processed nanotechnology as a simple and cost-effective fabrication method. The realization of the ultra-broadband...

In this work, a three-channel infrared photodetector with three independent related electric signals as a single optoelectronic chip has been introduced. The proposed structure has been implemented by exploiting an array of PbSe/ZnSe quantum dots and the PbSe/ZnS selective energy contacts considering solution-processed nanotechnology. The electron...

An approach has been suggested for the simulation of a quantum dot reflective semiconductor optical amplifier (RSOA) with wideband optical gain. This model is implemented by superimposing different quantum dot groups with various radii using solution process nanotechnology, which is both practical and frugal. Also, few works have been done, superim...

In this paper, we have studied different combinations of nanoparticles in the Fibonacci and the periodic array to simulate a transparent color display. We examined the effects of scattering and absorption cross-section of various combinations of three and six nanoparticles on the periodic and the Fibonacci arrays. For this purpose, we use spherical...

The application of nanoparticles in the transparent displays due to the unique properties of nanoparticles is one of the best and most efficient methods. The considering of two-dimensional Gaussian distribution for nanoparticles both radius and position is also common because of its natural and physical properties. In this paper, we intend to achie...

In this paper, the goal is to specify the type of metallic oxides including Fe2O3, Fe3O4, ZnO, Al2O3, MgO, TiO2, and NiO, provided as nano-powders. The phononic directional coupler is firstly employed and investigated to detect the materials. Subsequently, a novel locally-resonant structure based on the solid-solid phononic crystal is proposed to b...

In this article, a new method is suggested for achieving an ultra-broadband quantum dot reflective semiconductor optical amplifier (QD-RSOA). Also, about 955 µm bandwidth has been covered, including O, E, S, C, and L bands. This region is highly used in optical communication applications. Furthermore, three wavelengths have been chosen for having s...

One of the most important and challenging loss factors of photovoltaics is the heat production of energetic carriers excited by high energy incident photons. The present work shows that if carriers are extracted at their high energies before cooling down due to scattering, the conversion efficiency can be noticeably enhanced. To increase the effici...

Infrared (IR) cameras based on semiconductors grown by epitaxial methods face two main challenges, which are cost and operating at room temperature. The alternative new technologies which can tackle these two difficulties develop new and facile material and methods. Moreover, the implementation of high speed camera, which makes high resolution imag...

In this paper, the different arrays of core–shell nanoparticles are investigated to propose a high-quality transparent display. In this work, we compare the optical properties of the different types of deterministic aperiodic arrays in a visible range. To realize this idea, the Si–SiO2 core–shell nanoparticle is used, and with varying radius and di...

The world energy crisis, as well as global warming, has intensified an urgent need for renewable energies. Solar radiation can be converted to electricity by solar cells readily; however, the high cost of photovoltaic systems has hindered its worldwide commercialization. Also, the solar cells cannot be integrated directly to skyscrapers. Therefore,...

In this paper, we have introduced and investigated an integrated optoelectronic chip for the up-conversion of mid-infrared to visible light. A thin layer of the nanocrystalline photoconductive PbSe is put on the Base of the NPN bipolar junction transistor and a doped phosphorescence organic light-emitting diode is placed on the Collector contacts....

Nanoparticles based transparent display is one of the most successful methods to realize transparent monitors. Also, an array of nanoparticles, especially aperiodic arrangements, plays an important role in this case. Normally, when one talks about nanoparticles, the spherical morphology appears in mind, in which it is possible to implement differen...

In this paper, for the first time, the switchable two-color quantum dot laser has been realized considering solution process technology, which has both simultaneous and lonely lasing capability exploiting selective energy contacts. Furthermore, both channels can be modulated independently, which is a significant feature in high-speed data transmiss...

In this paper, the multi-wavelength solution-processed quantum dot laser has been proposed by the superimposed quantum dots. To this end, the rate equation framework has been developed to model the simultaneous lasing in desired wavelengths by considering inhomogeneous broadening of energy level as a result of the size distribution of quantum dots...

In this work, the optical gain engineering of an ultra-broadband InGaAs/AlAs solution-processed quantum dot (QD) semiconductor optical amplifier using superimposed quantum structure is investigated. The basic unit in the proposed structure (QDs) is designed and fabricated using solution-processed methods with considerable cost-effectiveness, fabric...

This paper proposes and simulates multi-wavelength terahertz wave generation using MOSFET with aperiodic gate structure. This emitter works at room temperature and spans the whole terahertz spectra. Structure of the emitter is like a MOSFET for which the channel and gate respectively consist of periodic and aperiodic graphene ribbons. By applying a...

We study the Smith-Purcell (SP) radiation emission generated in terahertz (THz) frequency range by an electron beam passing close to the surface of a 3-D quasi-periodic array of metallic slots. When more than one electron beam is used in the SP-based periodic structures, the two or more colors can be generated. In this paper, two-color SP emission...

This paper proposes and simulates three vacuum state devices each of which generates two-color terahertz radiation by Smith–Purcell emitter and dielectric layers. Each of the devices is a SiO2-made vacuum tube consisting of a Smith–Purcell emitter located at the bottom of the tube and also periodic dielectric layers located at the top. Smith–Purcel...

In this article, the relations between extinction cross section and Gold nanoparticle's parameters such as dimensions have been investigated. In this work, the extinction cross section of the core-shell nanoparticles is analyzed by changing the shell material and its thickness. By this, the interesting results such as shifting resonant peak in opti...

This paper presents a novel and robust design for a new kind of photonic crystal fiber with dodecagonal and circular array of air holes, aiming at a highly nonlinear coefficient, ultraflattened dispersion and ultra-low confinement loss. In this structure, circular lattices are added in two inner layers to obtain both ultra-low dispersion and ultra-...

In this paper, our main attempt was to reduce Total Internal Reflection (TIR) happening at Indium Tin Oxide (ITO, nito = 1.8 + 0.01i) and Glass (nglass = 1.51) interface, which is due to ITO's higher index in comparison with Glass's, that makes light guided in ITO layer, 50% of generated light in Wight Organic Light Emitting Diodes (WOLED) are trap...

In this paper, our main purpose is to reduce Total Internal Reflection (TIR) phenomenon that is happening at Indium Tin Oxide (ITO, nito = 1.8 + 0.01i) and Glass (nglass = 1.51) interface in WOLED to achieve higher output power. In normal WOLED because of higher refractive index contrast between ITO and Glass, guided waves usually limited into ITO...

The main focus of this study is to improve the light extraction efficiency, as well as directionality of organic light emitting diodes (OLEDs) using multi-layer structures between Indium tin Oxide (ITO) and glass layers in a typical OLED. In conventional OLEDs, only about half of the light generated in the emission zone can reach to the glass subst...

Photonic Quasi crystals as an interesting solution for optical signal processing tools are introduced. Optical characteristics in 2D 12-fold PQCs are examined in this chapter, which is based on an approximate analytic perturbation method, according to the fact that a complete PBG can be observed in PQCs when low dielectric contrast materials are us...

In this work, we present a new and semi-analytical method to investigate one-dimensional Fibonacci-class photonic quasicrystals from waveguiding properties point of view. Usually, the exact treatment for obtaining band diagram in these situations is very hard and the numerical methods are used. In this paper, we investigate the waveguiding properti...

A microcavity based on 12-fold photonic quasicrystals is achieved by the aid of alteration in the proposed structure. The central air hole is missed, and the three nearest surrounding holes radiuses and positions are modified in order to optimize the Q-factor. In addition, special fine variations are imposed on the mentioned parameters to shift the...

In this work, we have developed a semi-analytical model based on perturbation theory for evaluating optical properties of photonic quasicrystals. Although numerical techniques are being used for determining characteristics of photonic quasicrystals, it is believed that analytical studies based on approximations help us to understand the physical pr...

In this work, we have examined the waveguiding properties of photonic quasicrystal heterostructures based on the envelope approximation method. For determining the guided modes and the envelope of the field distribution in photonic quasicrystal heterostructures based on this technique, only knowledge of the photonic quasicrystal band structure and...

In this paper, for developing analytical and semi-analytical methods to evaluate band structure in photonic quasicrystals the perturbation theory is examined. It is shown that more isotropic and complete photonic band gap can be observed under low dielectric contrast for photonic quasicrystals in comparison with ordinary crystals and because of thi...

In this work, the optical pulse propagation and its distortion due to dispersion properties of the quasi-periodic structures and especially Fibonacci-class is investigated. Based on TMM method, we show that the Fibonacci-class quasi-periodic structures have large dispersion coefficients respect to periodic structures and in small length (versus per...

In this paper, we investigate the optical wave-guiding properties of the quasi-periodic band gap structures. In this case, the Fibonacci quasi-crystals are used and the eigenmodes and eigenvalues of the electromagnetic wave propagating through these structures are obtained. Also, the band structure of the system is obtained and the guiding modes di...

Optical pulse distortion and propagation through quasi-periodic structures generally and especially for Fibonacci-class, is investigated analytically and simulated numerically. In this analysis, the transfer matrix method (TMM) for distortion evaluation is used. The simulated results for Fibonacci-class quasi-periodic structures and pure periodic m...

In this paper, we will investigate the optical properties of Fibonacci-class quasi-periodic multilayer stacks with inhomogeneous index of refraction profile. In this work, the exact solution for inhomogeneous media and the transfer matrix method for evaluation of quasi-periodic multilayer stack are examined. Also, the inhomogeneous index of refract...

In this paper, we will investigate the optical filtering properties of chirped Fibonacci-class quasiperiodic homogeneous multilayer stacks. For this purpose, some well-known layer duration modulating functions, such as linear and exponential dependence, are used. Our simulations show that the obtained bandwidth for chirped Fibonacci-class multilaye...

In this paper, we will investigate the index of refraction modulation effect on optical filtering properties of Fibonacci-class quasi-multilayer stacks. In this work, some modulating curves are used for both pure and chirped Fibonacci-class structures. The effect of some modulating curves on filtering characteristics is investigated. Our simulation...

Optical filters are important basic blocks for signal processing. There are many alternatives for implementation of optical filters. In modern optical communications, for some special cases, we need to implement multi-band pass filters. In this work, we try to investigate quasi-periodic homogeneous structures as multi-band optical filters. For real...

Inhomogeneous optical slab or channel wave-guides are basic alternative for realization of the passive and active devices and systems in the full-optical engineering domain. Usually, the exact treatment for obtaining the reflected and transmitted light is very hard and the numerical methods are used. In this paper, we will investigate the optical f...

In this paper, we will investigate the optical properties of Fibonacci-class quasi-periodic multilayer stacks with inhomogeneous index of refraction profile. In this work, the exact solution for inhomogeneous media and the transfer matrix method for the evaluation of quasi-periodic multilayer stacks are examined. Also, the inhomogeneous index of re...