Direct probing of contact electrification by using optical second harmonic generation technique

Second Harmonic Generation Diagnostic of Layer by Layer Deposition from Disperse Red 1–Functionalized Maleic Anhydride Copolymer

Layer-by-layer (LBL) electrostatic assembly of poly-electrolytes is proving to be an increasingly rich and versatile technique for the formation of multilayered thin films with a wide range of electrical, magnetic, and optical properties. In the present work we synthesized a new nonlinear optical (NLO) maleic acid copolymer containing Disperse Red 1 moieties, built-up multilayer assemblies by a...

Direct probing of carrier motion and interfacial phenomena in organic films and devices by optical second harmonic generation and Maxwell- displacement-current

Probing and modelling of dynamical motions of carriers in organic materials is a fundamental research subject in science and electronics. According to the Maxwell’s electromagnetic field theory, electrons and dipoles are source of electric fields. As a result organic materials surrounding electrons and dipoles are polarized. By probing the dielectric polarization, we can visualize carrier motio...

Studies on the Optical, Mechanical and Dielectric Properties of Nonlinear Optical Single Crystal Bis (Guanidinium) Hydrogen Phosphate Monohydrate (G2HP)

Single crystals of nonlinear optical material bis (guanidinium) hydrogen phosphate monohydrate (G2HP) belonging to non centrosymmetric space group P 21c were successfully grown by the slow evaporation method. Optical transmittance and second harmonic generation of the grown crystals have been studied by UV-vis-NIR spectrum and Kurtz powder technique respectively. The transmittance of G2HP cryst...

Probing and modeling of carrier motion in organic devices by electric-field-induced optical second-harmonic generation

Optical klystron FEL scheme for x-ray coherent harmonic generation at ISLF storage ring

The possibility of inserting an optical klystron on the storage ring of an Iranian Light Source Facility as a Synchrotron Radiation Free electron Laser for coherence harmonic generation in the soft x-ray spectrum has been studied. The study has been performed using the 3D FEL simulation code GENESIS 1.3 and in accordance with the available characteristic parameters of ISLF. Different potential ...