Linear optical and third-order nonlinear optical properties of anthracene chalcone derivatives doped PMMA thin films

摘要: Abstract We report the linear optical and third-order nonlinear (NLO) properties of three anthracene chalcone derivatives, (E)-1-(anthracene-9-yl)-3-(4-bromophenyl)prop-2-en-1-one (Br-ANC), (E)-1-(anthracene-9-yl)-3-(4-chlorophenyl)prop-2-en-1-one (Cl-ANC) (E)-1-(anthracene-9-yl)-3-(4-nitrophenyl)prop-2-en-1-one (N-ANC) doped poly(methyl methacrylate) (PMMA) polymer thin films. The chalcones PMMA films were prepared using chemical spray pyrolysis technique at 10 wt%, 20 wt%, 30 wt% doping concentrations. absorption, transmittance, refractive index measured UV–vis-NIR spectra. surface roughness studied by atomic force microscopy (AFM). NLO investigated Z-scan continuous wave (CW) laser operating 532 nm wavelength. A saturable absorption self-defocusing effects observed from open closed aperture curves, respectively. calculated (n2∼10−9 cm2/W), coefficient (β∼10−3 cm/W) susceptibility (χ(3) ∼10−7 esu) increases with increase in concentration chalcones. Further, we relatively higher nonlinearity for N-ANC than that Br-ANC Cl-ANC, which demonstrates an enhancement nonlinearities simple structural variations. tunable behavior larger magnitude lower saturation intensity make them suitable candidates mode-locking, Q-switching cavity applications.