We observe optical third-harmonic generation in atomically thin films of MoS2 and deduce effective third-order nonlinear susceptibilities on the order of 10(-19) m(2)/V(2), which is comparable to that of commonly used semiconductors under resonant conditions. By measuring the susceptibility as a function of light wavelength, we find significant enhancements of the susceptibility by excitonic re...

Abstract We derive propagation equations modeling third-order susceptibility-induced nonlinear interaction and linear mode coupling in waveguides. model material susceptibility with Raman electronic response which include approximations suited for optical communications. validate our by comparing numerical integration of the to continuous wave measurements a silicon on insulator waveguide.

Quadratic nonlinear photonic crystals are materials in which the second order susceptibility is spatially modulated while the linear susceptibility remains constant. These structures are significantly different than the more common photonic crystals, in which the linear susceptibility is modulated. Nonlinear processes in nonlinear photonic crystals are governed by the phase matching requirement...

The influences of test variables on the outcome of susceptibility testing with caspofungin were tested with isolates of Candida spp. and Aspergillus fumigatus. Among six growth conditions tested with a range of inoculum sizes, the highest control growth yields were obtained in Sabouraud broth for all fungi, followed by RPMI 1640 (pH 7) for Candida spp. and antibiotic medium 3 (AM3) for A. fumig...

Surface plasmons (SPs) can be generated at the interface between two materials having opposite signs of dielectric susceptibility. [ 1 ] This principle has recently been exploited in many applications, ranging from enhanced optical transmission (EOT), [ 2 ] which can be used for enhanced photodetection, [ 3 ] biosensing, [ 4 ] optical trapping of small particles [ 5 ] and bacteria, [ 6 ] and ev...

Recent observation of efficient light emission from porous silicon has attracted much attention and renewed interests in the study of nonlinear optical properties of nanometer-sized quantum systems. In this paper, we study the third-order nonlinear optical susceptibility of semiconductor quantum wires. The quantum wires are taken to be circular columns with a cross section size of —1 nm. The ex...

The effective linear and third-order nonlinear susceptibility of graded metallic films with weak nonlinearity have been investigated. Due to the simple geometry, we were able to derive exactly the local field inside the graded structures having a Drude dielectric gradation profile. We calculated the effective linear dielectric constant and third-order nonlinear susceptibility. We investigated t...

The third-order nonlinear optical properties and optical limiting studies of donor substituted hydrazone derivatives were investigated using the single beam Z-scan technique at 532nm.The calculated values of nonlinear refractive index ,third-order nonlinear optical susceptibility and second order molecular hyperpolarizability are of the order of esu 11 10 , esu 13 10 and esu 31 10 respectively....