Md. Saiful Islam, Jakeya Sultana, Javid Atai, Derek Abbott et al.
In this paper, we present the design and analysis of a novel hybrid porous core octagonal lattice photonic crystal fiber for terahertz (THz) wave guidance. The numerical analysis is performed using a full-vector finite element method (FEM) that shows that 80% of bulk absorption material loss of cycl...
Abul Kalam Ajad, Md Jahirul Islam, Md Rejvi Kaysir, Javid Atai
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 th...
Md. Saiful Islam, Jakeya Sultana, Mohsen Dorraki, Javid Atai et al.
Jakeya Sultana, Md. Saiful Islam, Javid Atai, Muhammad Rakibul Islam et al.
We demonstrate a photonic crystal fiber with near-zero flattened dispersion, ultralower effective material loss (EML), and negligible confinement loss for a broad spectrum range. The use of cyclic olefin copolymer Topas with improved core confinement significantly reduces the loss characteristics an...
Md. Saiful Islam, Jakeya Sultana, Javid Atai, Mohammad Rakibul Islam et al.
Jannatul Mawa Nijhum, Tanvir Ahmed, Md. Anwar Hossain, Javid Atai et al.
An improved design of a D-shaped photonic crystal fiber (PCF)-based refractive index (RI) sensor is proposed that uses the surface plasmon resonance phenomenon. The sensor consists of a large semicircular open channel that is inserted at the upside of the D-shaped PCF. A thin plasmonic sensing layer...
Afroja Akter, Md. Jahedul Islam, Javid Atai
We study the stability characteristics of zero-velocity gap solitons in dual-core Bragg gratings with cubic-quintic nonlinearity and dispersive reflectivity. The model supports two disjointed families of gap solitons (Type 1 and Type 2). Additionally, asymmetric and symmetric solitons exist in both ...
Tanvir Ahmed, Jannatul Mawa Nijhum, Javid Atai
Nadia Anam, Tanvir Ahmed, Javid Atai
We analyze the stability of solitons in a semilinear dual-co re system where one core is linear with a Bragg grating and the other core is uniform and has cubic-quintic n onli earity. It is found that there exist three spectral gaps in the model’s linear spectrum. The quiescent soliton solutions are...
Soundarzo Tasnim, Md Jahirul Islam, Md Rejvi Kaysir, Javid Atai
Nanoparticle (NP)-based Organic Photovoltaic (OPV) cells have the potential to increase power conversion efficiency (PCE) due to the capacity to excite localized surface plasmon resonances (LSPRs) induced by conductive electron oscillation. Widespread deployment of this technology requires further i...
Afroja Akter, Md Saidul Islam, Javid Atai
We consider dynamical stability of quiescent gap solitons in coupled Bragg gratings with dispersive reflectivity in a cubic-quintic nonlinear medium. It is found that there exist two disjoint families of quiescent solitons within the bandgap, namely Type 1 and Type 2 solitons. Also, in each family, ...
Nadia Anam, Javid Atai
We investigate the existence and stability of moving solitons a semilinear directional coupler where one core has cubic-quintic nonlinearity and the other core is linear with uniform Bragg grating.
Md. Jahedul Islam, Javid Atai
Interactions between quiescent gap solitons in dual-core Bragg gratings with cubic-quintic nonlinearity are systematically investigated. In a previous work, it was found that the model supports symmetric and asymmetric soliton solutions. For each of these categories, there exist two disjoint familie...
Tanvir Ahmed, Javid Atai
The existence and stability of moving Bragg grating solitons are systematically investigated in a dual-core system, where one core is uniform and has Kerr nonlinearity, and the other is linear with Bragg grating and dispersive reflectivity. It is found that moving soliton solutions exist throughout ...
Md. Seium Mahtab Dipto, Md Jahirul Islam, Md Rejvi Kaysir, Javid Atai
The development of perovskite solar cell (PSC) is one of the major advances in photovoltaic technology in recent years due to its lower cost, simple fabrication process, lightweight, sustainability, and being environmentally friendly. However, the power conversion efficiency (PCE) of the conventiona...
Afroja Akter, Md. Jahedul Islam, Javid Atai
The existence and stability of moving gap solitons in a coupled fiber Bragg gratings with dispersive reflectivity in a cubic-quintic nonlinear medium are investigated. The effect of dispersive reflectivity on the stability of solitons is analyzed.
Tanvir Ahmed, Javid Atai
In this paper we present the systematic analysis of the collisions of counter-propagating gap solitons in a linearly coupled dual-core system where one core has only Kerr nonlinearity and the other core is linear which contains a nonuniform Bragg grating with dispersive reflectivity.