The deterioration of environmental conditions decreases the quality of people lives permanently. The prime reason in mortality of people lives in industrial developing countries is disease related to blood circulation system. In this work, monitoring of blood protein i.e. fibrinogen is done by double slot hybrid plasmonic waveguide. The concentration of fibrinogen increases rapidly during various inflammatory processes. The fibrinogen is a type of protein which is found in blood coagulation system, which is the main factors of many cardiovascular diseases in human.
This paper focus on the theoretical investigation of quantum confined Stark effect (QCSE) in strain compensated SiGeSn/GeSn single quantum well (QW). Eigen energies in presence of electric field, for Г valley conduction band (Г- CB) and heavy hole band (HH)) are obtained from the self consistent solution of coupled Schrödinger and Poisson equations by finite difference method. Absorption coefficient considering excitonic effect for direct transition of HH band to Г valley is calculated. A significant shift in absorption peak towards longer wavelengths is observed.
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.
A plasmonic metal–insulator–metal (MIM) waveguide has great success in confining the surface plasmon up to a deep subwavelength scale. The structure of a nonlinear Mach–Zehnder interferometer (MZI) using a plasmonic MIM waveguide has been analyzed. A one-bit magnitude comparator has been designed using an MZI and two linear control waveguides. The device works on the Kerr effect inside the plasmonics waveguide. The mathematical description of the device is explained. The simulation of the device is done using MATLAB® and the finite-difference time-domain (FDTD) method.
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 this paper, an effective design of all-optical logic gates like XOR gate and AND gate is presented. The structure of these two logic gates is based on T-shape waveguide with optimized silica dielectric rod. Along with the two input ports which are essential for the required logical operation, an extra reference input port is used. These two logic gates can be used to construct for various combinational logic circuits, data bit comparison circuits, pattern matching, data encoding/decoding and different switching functions etc.
The limitation of conventional electronics is mitigated by all optical integrated circuits which have potential of high
speed computing and information processing. In this work, an all optical AND gate using optical Kerr effect and optical
bistability of a plasmonic based Mach-Zehnder interferometer (MZI) is proposed. An MZI is capable for switching of
light according to the intensities of optical input signal. The paper constitutes with mathematical formulation of device
and its study is verified using finite difference time domain (FDTD) method.
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