The synthesis and third-order nonlinear optical properties of resonance Benzo[a]phenoxazinium salts
摘要:
The third-order nonlinear optical properties of a series of resonance benzo[a]phenoxazinium salts in acetic acid solution were studied using the Z-scan technique employing a Nd YAG nanosecond laser at 532 nm The compounds displayed strong reverse absorption with third-order nonlinear optical coefficients of 042-1.20 x 10(-11) esu and second hyperpolarizabilities of 2 75-7.29 x 10(-29) esu, respectively. Quantum chemical calculations showed that the compound with more stable highest occupied molecular orbital energy also displayed highest second hyperpolarizability (C) 2010 Elsevier Ltd All rights reserved