Publications
Plasmonic Color Filters Coupled with CMOS Photodetectors Integrated Within the Device
Sep 9, 2025Journal INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND ANALYSIS
DOI https://doi.org/10.47191/ijmra/v8-i09-31
Issue 9
Volume 8
Modern, portable electronics employ CMOS image sensor arrays, which have tiny active pixels that are well-suited to the subwavelength mode volumes of plasmonic filters. Broad transmission bandwidths (> 100 nm) are characteristic of most plasmonic filters, making them ideal for CMYK or RBG color filtering. Achieving CMOS image sensors with multi- and hyperspectral imaging capabilities would be possible with a significant reduction in the peak width of filter transmission spectra. Single transmission bands as thin as 17 nm are produced by multi-mode interference phenomena, which are induced by the design of 4-layer metal-insulator-metal-insulator-metal structures. These phenomena reduce spurious transmission characteristics. The fundamental structure of these multilayer slot-mode plasmonic filters (MSPFs) may function across a wide range of wavelengths, allowing for systematic variation of the transmission peaks over the visible and near infrared spectra. This, in turn, produces a filter that can be integrated into complementary metal-oxide semiconductors (CMOS). We provide practical prototypes of MSPF filter designs that can attain a visible bandwidth of less than 30 nm and a full width at half maximum (FWHM) of 50 nm. We also detail how to make the experimental structure approach the limitations proposed by the model.
A Simulation Model of a System-based Concentrated Solar Power System (CSP) for Maximum Solar Energy Harvesting Applications
Feb 10, 2023Journal NTU Journal for Renewable Energy
DOI https://doi.org/10.56286/ntujre.v4i1.410
Issue 1
Volume 4
Solar energy has piqued people's curiosity since the dawn of civilization, and the technology for harvesting it has advanced at a rapid pace. The development of technology to increase the efficiency of the solar system is of critical relevance due to the energy difficulties that civilization has been facing. Scientists have used the solar concentrated system for several years since it allows for the concentration of solar energy into a concentrate, allowing for a significant increase in energy efficiency. A parabolic dish setup is described in this article as a dish-shaped concentrating collector that reflects solar energy onto a receiver located at the focal point. This concentrator is set atop a framework with assumption of a two-axis tracking system to track the sunlight. Typically, the acquired heat is utilized directly by a heat engine constructed on the receiver that travels with the dish. Typically, the acquired heat is utilized directly by a heat engine constructed on the receiver that travels with the dish. The suggested dish could achieve very high temperatures and might be utilized in solar reactors to generate high-temperature solar fuels. Even though dishes are seldom utilized commercially for power production, engines are now favored for power conversion. Consequently, the purpose of this study is to explain the benefits of this technology in a world where fossil fuel usage is a genuine issue that society must address.
Digital Communication Based on Image Security using Grasshopper Optimization and Chaotic Map
Oct 2, 2022Journal International Journal of Engineering
DOI : 10.5829/ije.2022.35.10a.16
Issue 10
Volume 35
Encryption is very important to protect sensitive data, especially images, from any illegal access and infringement. This research is presented to provide an image encryption optimization method for communication based on image security. This method uses the grasshopper optimization algorithm to perform optimal encryption and irregular logical mapping. Initially, this approach creates multiple encrypted images and a chaotic map, in which the session key for the initial conditions of the map depends on a simple suspended image. After that, the encrypted images work as an initial and particles set for optimization through the grasshopper optimization algorithm. The optimized encoded image with the correlation coefficient of the continuous pixels is expressed as a function of proportion. The results from Matlab simulation of the proposed encoding method show that the encrypted images are the same, and the adjacent pixels are highly correlated with other outstanding encoding rows, such as planar histogram entropy and effective pixel rate of change average correction strength.
Analysis and simulation of three MANET routing protocols: A research on AODV, DSR & DSDV characteristics and their performance evaluation
Sep 30, 2019Journal Periodicals of Engineering and Natural Sciences
DOI 10.21533/pen.v7i3.717
Issue 3
Volume 7
Mobile ad-hoc network allows electronic devices to independently configure the communication; even if the device changes its position, the (MANET) can maintain the connectivity among the devices since it has the capability to arrange a temporary network dynamically. The lack of central infrastructure and the freedom of mobile nodes to move randomly will create several problems, like routing and security issues. MANET requires a stable routing algorithm to adapt to the network that changes its topology randomly at any time. Several studies were conducted with different scenarios to suggest the best protocol for routing. However, a clear performance evaluation is still a missing part, because the dissimilarities in the mechanism of the protocol can lead to important performance differences. This article provides a performance assessment of (DSR), (DSDV), and (AODV) protocols. Research results and the evaluation of the network are made based on network size, mobility, and variable network load by using NS2 application for simulation. The results reveal that the (AODV, DSR) are more efficient than DSDV and reasonably more proper for ad-hoc applications and projects.