A microring resonator based sensor is proposed to detect different poisonous gases, such as carbon monoxide, phosphine, and nitrogen dioxide. These gases are very dangerous in environment if the leakage concentration is high. The single slot microring resonator sensor is used for detection of hazardous gases. The sensor has been analyzed through finite-difference-time-domain method by varying the radii of microring resonator from 1.4 μm to 2.2 μm and refractive index of the analytes. Transmission of microring resonator is observed and detected the different poisonous gases.
This work is based on surface plasmon (SP’s) confinement in nano-slots of double slot ring resonator structure, which can employ for diverse liquid sensors and cause of anemia in homosapiens. The structure is depicted using hybrid plasmonic waveguides (HPW) due to its absolute attribute of longer propagation length of SP’s. The structure of waveguide is delineated in such a way that optical energy is extreme mainly in narrow slots of two metallic layers. The HPW based sensor is used to detect the causes of anemia which is very common and severe almost among every step of age. The compatibility and capability of sensor will be analyzed by calculating its sensitivity, quality factor and figure of merit.
The under laid gas and oil pipelines on the seafloor are prone to various disturbances like seismic movements of the sea bed, oceanic currents, tsunamis. These factors tend to damage such pipelines connecting different locations of the world dependent on these pipelines for their day-to-day use of oil and natural gas. If damaged, the oil spills in the water bodies cause grave loss to marine life along with serious economic issues. It is not feasible to monitor the undersea pipelines manually because of the huge seafloor depth. For timely detection of such damage, a new technique using optical Fiber Bragg grating (FBG) sensors and its installation has been given in this work. The idea of an FBG sensor for detecting damage in pipeline structure based on the acoustic emission has been worked out. The numerical calculation has been done based on the fundamental of strain measurement and the output has been simulated using MATLAB.
In this work, Pd/Pt material based fiber Bragg grating (FBG) sensors has been proposed for detection of hydrogen sulfide gas. Here, characteristics of FBG parameters were numerically calculated and simulated. The variation in reflectivity based on refractive index has been shown. The reflectivity of FBG can be varied when refractive index is changed. The proposed sensor works on very low concentration i.e., 0% to 1%, which has the capability to detect in the early stage.
In this ultra fast computing era power optimization is a major technological challenge that requires new computing paradigms. Conservative and reversible logic opens up the possibility of ultralow power computing. In this paper, basic reversible logic gate (double Feynman gate) using the lithium-niobate based Mach-Zehnder interferometer is proposed. The results are verified using beam propagation method and MATLAB simulations.
In this study, J-K flip-flop is proposed utilizing electro-optic effect of lithium niobate based Mach-Zehnder interferometers (MZIs). J-K Flip flop is most versatile flip-flop amid basic flip-flops. It has vast applications in data storage, data transfer, frequency division, binary counters etc. Lithium niobate (LiNbO3) based MZIs provide both the required bandwidth and the equally important means for minimizing the effects of dispersion. The work is carried out by simulating proposed device with Beam propagation method. The paper also constitutes the mathematical description of device and thereafter simulation using MATLAB.
The all optical routing is novel approach for establishment of transparent information flow in optical networks. The diffraction limit of light is major factor which backseats the photonic components and mitigated by integrated all optical components. In this paper, an all-optical signal router with two optical inputs using nonlinear plasmonic Mach-Zehnder interferometer (MZI) is proposed. The nonlinearity in MZI structure is achieved by using nonlinear Kerr-material, which is also responsible for switching of optical signal across two output ports. The study of proposed device is carried out using finite-difference-time-domain (FDTD) method and verified using MATLAB.
MIM plasmonic waveguides are considered in proposed work, due to their ability of confining the surface plasmons to deep subwavelength scale or beyond diffraction limit. By cascading various MIM waveguides Mach-Zehnder interferometer (MZI) is designed which has been used to design all-optical 3 × 8 line decoder. To attain the nonlinearity Kerr material has been used. The proposed device is studied and analyzed using finite-difference-time-domain (FDTD) method and MATLAB simulations.
In recent years, it has been shown that reversible logic can play an important role in power optimization for computer design. The various reversible logic gates such as Feynman, Fredkin, Peres, and Toffoli gates have been discussed by researchers, but very little work has been done on reversible sequential circuits. Design of reversible sequential circuits using lithium-niobate-based Mach–Zehnder interferometers is proposed. Here, flip-flops are designed with the help of basic reversible logic gates such as Feynman, Fredkin, and Peres gates. Theoretical descriptions along with mathematical formulation of the devices are provided. The devices are also analyzed through finite difference-beam propagation method and MATLAB® simulation.
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