Impulsive orientation of symmetric-top molecules excited by two-color femtosecond pulses is considered. In addition to the well-known transient appearing immediately after pulse and then reemerging periodically due quantum revivals, we report phenomenon field-free long-lasting orientation. Long-lasting means that time averaged remains non-zero until destroyed other physical effects, e.g., inter...

The present study deals with the investigation of change in hyperpolarizability Pentacene-2,5-dione (PD) on introduction gold (Au) and silver (Ag) nanoclusters using density functional theory (DFT). involvement induces intramolecular interactions, which is confirmed by electrostatic potential plot Mulliken charge distribution. process adsorption metal clusters surface PD investigated absorption...

• Characterization of the nonlinear refraction coefficient CsPbBr 1.5 I QD. Investigation averaged second-order hyperpolarizability perovskite Analyses SSPM diffraction symmetry from Demonstration SSPM-mediated all-optical switching. The (CsPbBr ) quantum dots (QDs) was characterized using intensity-dependent spatial self-phase modulation (SSPM). radial intensity variation Gaussian beam display...

The structure, reactivity, natural bond orbital (NBO), linear and nonlinear optical (NLO) properties of three thiazole azo dyes (A, B and C) were monitored by applying B3LYP, CAM-B3LYP and ωB97XD functionals with 6-311++G** and aug-cc-pvdz basis sets. The geometrical parameters,dipolemoments,HOMO-LUMO(highest occupied molecular orbital,lowest unoccupied molecular orbital) energy gaps, absorptio...

A comprehensive study on the structural, electronic and nonlinear optical (NLO) properties of alumina nanostructures (Al2O3)n with n = 2-5 belonging to the groups III and VI dopants carried out by density functional theory. The NBO charges exhibit dopant atoms caused to the increasing charge transfer and introduces acceptor-donor model for NLO response of alumin...