3,3′-Benzene-1,4-diylbis[1-(substituted)phenylprop-2-en-1-one] derivatives: A new class of materials for third-order nonlinear optical applications

Nonlinear optical behaviour of indium-phthalocyanine tethered to magnetite or silica nanoparticles

“…However for the SiNP-1, there are only slight changes in the values of b eff as I 00 increases. Since it has been reported that for multi-photon absorption (nPA) dependent RSA, the values of b n should be relatively invariant with changes in the on-axis peak fluence, I 00 , [59][60][61] it is thus reasonable to suggest that the predominant mechanism responsible for the observed RSA in SiNP-1 is two-photon absorption, even though there still exist ESA. Thus, both materials exhibit RSA that is driven by two-photon and excited state absorption in addition to the regular nonlinear scattering (NLS) process that is known for magnetite and silica nanoparticles.…”

Study on third-order nonlinear optical properties of 4-methylsulfanyl chalcone derivatives using picosecond pulses

“…Here in this molecules Br is present at the meta position on the aromatic ring and the length of the charge transfer axis is less compared to other two molecules. It was observed that as the length of the charge transfer axis contributes to nonlinearity [25]. The dihedral angle between aromatic rings is 47.828, 50.038 respectively for 4Br4MSP and 3Br4MSP.…”

Investigation on third order nonlinear optical, electrical and surface properties of organic stilbazolium crystal of 4-N,N-dimethylamino-N′-methylstilbazolium p-methoxybenzenesulfonate

“…Poornesh et al have found that the amino and methoxy groups act as electron donating units and the charge transfer takes place from the ends of the molecule to the center. Hence, the nonlinear optical response tends to increase on enhancing the electron donating ability of the donor units [20]. The value of v (3) is found to be larger than the other well known compounds and it is due to the p-electron cloud movement from the donor to acceptor which makes the molecule highly polarized [21].…”