Simulation design of silver nanoparticle coated photonic crystal fiber sensor based on surface plasmon resonance

Abstract

Surface Plasmon Resonance (SPR) is the charge density excitation oscillation (surface Plasmon’s, (SP)) caused by the polarized light along with the metal-dielectric interface by agreeing to phase-matching condition between polarized light and SPR. SPR method has unusual advantages like label-free, real-time and high resolutions with less than 10-7 RIU which is not consenting with other sensing methods. Photonic Crystal Fiber (PCF) presents unique features like design elasticity, geometric flexible and extraordinary guiding mechanism which head for better performance contrast conventional optical fibre, Additionally, the presence of air holes gives the possibility to insert multi able materials, that can recognize the interaction of travelling light and materials operatively. Adding the advantages of PCF to the properties of SPR, lead to design very strong and unique devices in different applications. In this paper, the PCF sensor based on SPR technique had been presented. The inner holes of PCF were coated with silver and then filled with air and ethanol. This was achieved theoretically by Finite Element Method (FEM). When the phase-matching condition was achieved at a fixed wavelength, the energy of the core-guided mode is shifted to the plasmon area and a resonant loss peak is observed at this wavelength. The simulated results show that a blue shifting is obtained when the outer air holes of PCF is filling with ethanol while the inner ring is filled with silver nano-particles. The maximum resolution and sensitivity are 5.66*10-4 RIU, 132.3 nm/RIU respectively in the sensing range of air refractive index to ethanol refractive index are obtained. The submitted design could be very useful in many fields like refractive index and temperature sensing applications.

Structural and elastic properties of MPxAs1-x (M = Al,Ga,In) alloys

“…We utilize the empirical pseudopotential method (EPM) and GGA method joined with the virtual crystal approximation (VCA). We compare the results of our binary compounds AlAs, AlP, GaAs, GaP , InAs and InP with the available theoretical [9] and experimental data from the literature, which are in good agreement. It is noted that the pseudo potential method gives a lattice constant greater than that given by the GGA one.…”

Manufacturing of NPK nano fertilizer and its effect on growth and of cut flowers production in two types of Rosa spp

“…Middle East and North America, genus Rosa includes mostly deciduous shrubs, and the fruits are rich in vitamins such as A, B3, C, D and E, in addition to citric acid and dyes, among others, China was the first to produce hybrid tea. Rose contains 200 species and nearly 1800 varieties [8].…”

Hexagonal GaN nanostructure via electrochemical etching

“…GaN has received much attention because of its wide direct band gap 3.4 eV [1], and its promising potential for semiconductor optical and electronic devices, which are suitable for high temperature, high power, and high frequency applications. Typical techniques of GaN layer growth include metalorganic chemical vapor deposition (MOCVD) [2], reactive molecular beam epitaxy (MBE) [3], hydride vapor phase epitaxy (HVPE) [4] and reactive sputtering [5]. There is large number of reports on synthesis of GaN powders by chemical reaction [6,7], but synthesis of GaN thin films is still a challenge.…”