Md Jahirul Islam

Md Jahirul Islam
Khulna University of Engineering and Technology | KUET · Department of Electrical and Electronic Engineering

Doctor of Engineering

About

38
Publications
9,540
Reads
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135
Citations
Citations since 2016
30 Research Items
119 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
Introduction
Optics, Nonlinear Optics, Soliton

Publications

Publications (38)
Article
Full-text available
Single-molecule techniques have shifted the paradigm of biological measurements from ensemble measurements to probing individual molecules and propelled a rapid revolution in related fields. Compared to ensemble measurements of biomolecules, single-molecule techniques provide a breadth of information with a high spatial and temporal resolution at t...
Article
Full-text available
D-shaped Surface Plasmon Resonance (SPR) based sensors show great promise for detecting different analytes with improved sensitivity and resolution. This work focuses on the investigation of the effect of gold (Au) strip's shape on the performance of D-shaped SPR sensor having a single mode germanium (Ge) core and microfluidic channel for analytes....
Article
We investigate the photonic bandgap structure, soliton properties and their stability in a semilinear coupled system where one core has cubic–quintic nonlinearity and is equipped with a Bragg grating, while the other one is uniform and linear. The investigation reveals that three distinct bandgaps, namely the upper, lower and central gaps, exist in...
Article
This study reports the strain-dependent efficiency of the InGaN-based multi-junction solar cell (MJSC) for the first time. The route of strain in MJSC is identified to be the results of dissimilar lattice constants between layers of sub-cell grown epitaxially with bandgap stepping. Utilising multi-layered strain model, the state of strain and its m...
Article
Full-text available
Terahertz (THz) radiation has recently gained much attention in diverse fields ranging from short-range wireless communication to biomedical applications. In general, THz radiation is much difficult to transmit through conventional waveguides due to experiencing higher transmission losses. Many waveguide-based technologies have been proposed in rec...
Article
In this work, we present the design of a WGM ring resonator that utilizes a target particle recipient layer deposited in the inner part of the bus to detect and quantify the presence of hemoglobin (HB) molecules in blood samples. Numerical investigations are carried out systematically to identify the resonator's spectral response and thenceforth me...
Conference Paper
This work presents an effective design of Mach-Zehnder Interferometer (MZI) based optical sensor having whispering gallery mode (WGM) ring resonator (RR), where RR is coupled in the MZI’s sensing arm and acts as a sensing window. The unique feature of WGM-RR facilitates both spectral and phase response when the target biological particle interacts...
Article
Full-text available
Recently, hollow-core fibers having negative curvature of the core-cladding boundary become promising for their inexplicit guiding mechanism and ultra-low loss characteristics. Here, we report a modified fiber design, which accumulates the supremacy of tube lattice and negative curvature structures to attain lower confinement loss (CL) for multi ba...
Article
Full-text available
Photonic crystal fiber (PCF) based surface plasmon resonance (SPR) sensors show great promise in different fields due to their flexibly, remote accessibility and remarkable sensing capability. To improve the performance (e.g. sensitivity) of PCF-based SPR sensors, two strategies are generally employed: (i) use of new plasmonic materials, and (ii) e...
Conference Paper
Full-text available
Luminescent solar concentrators (LSCs) offer a cost-effective alternative of harvesting the conventional concentrated solar energy. It uses fluorescent materials embedded in an optical waveguide to absorb, reemit, and concentrate incident solar irradiance to the edges of the waveguide, where small Photovoltaic (PV) cells are attached. Quantum dot (...
Conference Paper
Full-text available
Capillary optical fibers (COFs) recently show great promise due to their simplest structure for different sensing applications. Confinement loss (CL) is one of the key parameters that changes with physical sensing measurands. This paper describes a systemic way to understand different modes in COFs, which is necessary for understanding different se...
Conference Paper
Full-text available
Hybrid renewable energy systems (HRESs) have a great potentiality to provide a more reliable power supply, when compared to a system based on a standalone source. The hybrid system supports the modular design that can mitigate problems associated with the use of individual sources by combining them all in a systematic procedure. In this paper, comp...
Article
We systematically investigate the interaction of co-propagating Bragg grating solitons in a dual-core fibre in which one of the cores has a Bragg grating written a cubic-quintic nonlinear medium and the other one is linear and uniform. In a previous work, it has been shown that this structure supports two disjoint families of Bragg grating solitons...
Article
Full-text available
The existence and stability of quiescent Bragg grating solitons in a dual-core fiber, where one core contains a Bragg grating with cubic–quintic nonlinearity, and the other is a linear are studied. The model admits two disjoint bandgaps when the relative group velocity in the linear core, c, is zero: one in the upper half and the other in the lower...
Article
The existence and stability of Bragg grating solitons in a coupler, where one core is equipped with a Bragg grating (BG) and has cubic-quintic nonlinearity and the other is linear, are studied. When the group velocity term in the linear core is zero (i.e. c = 0), the system's linear spectrum contains two separate bandgaps. It is found that soliton...
Conference Paper
Full-text available
Enhancing conversion efficiency is the main object in the photovoltaic technology of solar cells. III-V semiconductors, InGaN alloy are very encouraging candidates for solar cells. In recent years, InGaN alloy provides the ability to tune the band gap for solar energy conversion. In this work, InGaN based QW and QD solar cells have been theoretical...
Article
Full-text available
The metal organic vapor phase epitaxy (MOVPE) growth of indium gallium nitride (InGaN) has been discussed in detail towards the fabrication of solar cell. The InGaN film with In contents up to 0.4 are successfully grown by controlling the fundamental growth parameters such as the precursor gas flow rates, temperature etc. The formation of metallic...
Article
Full-text available
This paper describes the theoretical design and gain analysis of InGaN-based 1.55 ìm laser. The lasers with this wavelength are ideally suited for medium and long distance transmission with higher data rates. These lasers are also compatible and ideally matched with the existing fiber optic infrastructures and band width with substantially lower tr...
Article
Full-text available
Temperature data logger is the most popular device for continuous monitoring temperature, data storing and protection for any system. In order to realize the high performance temperature data logger a simplified design with protection scheme and implementation are very much essential. In this work a computer based temperature data logger with therm...
Article
Full-text available
This paper describes the theoretical design and performance of a novel InGaN-based 1.55 mu m quantum well laser. A careful analysis of the optical and modal gain, threshold behavior, optical output, and efficiency with cavity length has been carried out. The spectral range of the optical material gain is found to be narrow and modal gain varies sha...

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