Bragg spaced quantum wells represent a unique class of resonant photonic materials, wherein a photonic bandgap is created by the periodic spacing of quantum wells and the associated variation in the complex susceptibility (index and absorption) of the material. Interest in BSQWs has grown in the past decade due to their large ultrafast nonlinearities and the corresponding large ultrafast reflec...

Bi2Se3 thin film was prepared using thermal evaporation . Structure and surface topography were investigated both of Diffraction Electron Microscope (DEM) Transmission (TEM). Optical results confirmed that has a direct energy gap. Moreover, the values for all oscillating (Eo), dispersion (Ed) ratio free carrier concentration on effective mass (N/m*) determined optically. The dielectric constant...

Noncentrosymmetric potassium dihydrogen phosphate (KH2PO4 or KDP) in the tetragonal crystal phase is arguably the most extensively studied nonlinear optical crystal in history. It has prolific applications ranging from simple laser pointers to laser inertial confinement fusion systems. Recently, type IV high-pressure KDP crystal sheets with a monoclinic crystal phase having centrosymmetric prop...

Optical nonlinearity and dynamic response of a novel inorganic metal cluster (m3-MoSe4)Ag3(PPh3)3Cl were studied. Large optical limiting effect was observed with the inorganic metal cluster (m3-MoSe4)Ag3(PPh3)3Cl dissolved in CH2Cl2. We also proved that nonlinear scattering contributes much to its optical limiting performance, which counts for nearly 75% of the total nonlinear energy loss used....

LLE Review, Volume 74 125 In the interaction of strong fields with matter, considerable interest has been shown in the development of high-efficiency frequency up-conversion of ultrashort laser pulses. One important area of interest is in ultrafast laser–solid interactions where up-conversion can lead to higher absorption due to higher-density interactions1 and to an enhancement of the pulse-in...

In this paper, a photonic crystal structure for comparing two bits has beenproposed. This structure includes four resonant rings and some nonlinear rods. Thenonlinear rods used inside the resonant rings were made of a doped glass whose linearand nonlinear refractive indices are 1.4 and 10-14 m2/W, respectively. Using Kerr effect,optical waves are guided toward the correc...