Nonlinear optical and all-optical switching studies of palladium (II) complex

作者：Manjunatha K B^*; Dileep R; Umesh G; Bhat B Ramachandra

来源：Materials Letters, 2013, 105: 173-176.

DOI：10.1016/j.matlet.2013.03.076

• NLO
• Organic
• Optical materials and properties
• Z-scan

Palladium complex with Schiff-base (PdL) was synthesized and composite films were fabricated on glass substrates by the spin coating technique. Z-scan and degenerate four wave mixing (DFWM) studies on the complex were performed using Q-switched Nd:YAG 7 ns laser pulses at 532 nm to reveal the third-order nonlinear optical (NLO) parameters. The third-order NLO susceptibility (chi((3)) and second-order hyperpolarizability (gamma(h)) in film form are estimated to be of the order of 10(-11) and 10(-30) esu respectively. Large nonlinear absorption (NLA) due to reverse-saturable absorption (RSA) in the complex exhibits good optical power limiting (OPL) performance. All-optical switching (AOS) experiments were performed using the pump-probe method. The Z-scan investigations reveal that the switching is caused by excited-state absorption (ESA) of the He-Ne laser.

• 出版日期2013-8-15