Hamilton mutual influence electron-phonon in a polar crystalline layer in contact with two layers non polar

This Article includes theoretical phenomena to oscillation of electron in malty layers systems used in deferent electronic industry and various solar cells. Also it looks in particular to situation of polar oscillation of lattice electron plasma, and charge oscillation of volume and surface. Then detect Hamilton operator of electron-phonon effect. After that we may discuss in detail the situation of Polaron at the edge of thin crystal layer of polarized semiconductors, as well as study of Excitons and its quantum effects in malty systems in case of potential wells. It also include the light scattering in this systems and semiconductor.

The Influence of X – ray Polarization Degree on the Differential Scattering Cross - Section

This work aims to find the differential scattering cross-section for X-ray scattered by aluminum target with angles in intervals in accordance to both polarization cases ( completely – partly). In addition, the relative scattered intensity and polarization degree have been presented as a function of scattered angles and the extreme values are found for each curve.

Corrosion Study of Iron and how protection it

We studying in this research the reaction with Zinc sulphate in an aqueous solution by physical - chemical method in presence of Succinic Acid , and determined compounds which are formed in this solution and we calculated of it formation the constants. After we used these electrolytes in plating by Zinc , that is by electro precipitation of this metal on the solid electrodes (steel, copper) so that we definite the best of these electrolytes for galvany and the set necessary conditions for its use.

Development the performance Of Optical Network Units (ONU) by Polarization Division Multiplexing technique

This research proposes the development of Optical Network Units by introducing an all optical Filter. This optical filter can treat WDM and PDM technology at the same time enabling us to send a channel on the horizontal and vertical of the same wavelength .The hybrid WDM-PDM technology allows to delivery double channels for users without any changing in infrastructure between optical central office and user . Firstly , this article prove the idea of hybrid WDM-PDM technology by OptiSystem7.0 simulator, secondly we study proposed all optical Filter for three cases of optical access: WDMPDM( Downstream), WDM(Downstream)/( TDM(Upstream) , WDM(Downstream)/ WDM(Downstream) recommended by the international communication federation, ICF.

Polarization Effect in Metal-Insulator-Semiconductor structures

This research is a theoretical study for the scattering mechanism of the charge carrier in the transport tunnels of system consisting of metal-insulator- semiconductor (MIS)- When the insulator is polarized where the conductivity of surface for semiconductor polarization behavior due to charge transfer during interfaces. The aim of this research is to investigate the effect of self-action and polarization potentials on the ground state of electron- polaron in semiconductor layer by means of is olating the Schrodinger equation and discussion of some special cases such as the potential is triangular form (case of contact metal – semiconductor).

Polaron in Thin Layer of polarized crystal

This paper contains the following concepts: definitions about polaron, concepts of polarons, large polaron, small polaron, and development of quantum theory for electron self-action potential in a system consisting of three contact different semi-conductor thin layers, finding polaron potential energy, and studying the case in which an electron is located inside the thin layer or on its surface. Studying the effect of dielectric anisotropy of layers on electron-(hole) potential energy in the above mentioned thin layers.

The study of 80 MHz Self starting passively mode-locked Erbium-Doped Fiber Laser via nonlinear polarization rotation with SESAM

Erbium-Doped Fiber Laser, EDFL, passively mode-locked via only Nonlinear Polarization Rotation, NPR, and via NPR with Semiconductor Saturable Absorber Mirror, SESAM, is studied. Self start single pulse train with pulse width of 114 fs and repetition rate (PRR) of 80 MHz has been obtained when 55 cm EDFL, passively mode-locked via NPR only. Inserting SESAM in EDFL cavity leads to shorten the pulse width up to 88 fs, increases the amplitude stability up to 96% and lower the phase noise jittering to around 26 fsec. Stable second harmonic self starting passively mode-locked EDFL with pulse width of 284 fs has also been observed only when SESAM was used in the cavity. Multi-pulsed system passively mode-locked via NPR for EDFL length of 80 cm with time difference between the successive multi-pulses ranged from few picoseconds to nanoseconds, has been observed.