Ultrafast optical limiting ability of trans-stilbene enhanced and broadened by a donor–π–acceptor structure

Abstract

It was shown that trans-stilbene (TSB) has great potential to achieve ultrafast optical-limiting through the process of three-photon absorption (3PA) induced excited state absorption(ESA). The present paper shows that the...

Intramolecular charge transfer enhanced optical limiting in novel hydrazone derivatives with a D1–D–Ai–π–A structure

“…This phenomenon was also observed in trans-stilbene with a donor–π–acceptor structure. 17 Accordingly, the added acceptor (A i ) and donor D 1 both play a crucial role to make the charge transfer occur in the GSA and ESA.…”

“…Similar results have also been reported in the previous literature. 17,34 In addition, it is also seen that those novel hydrazone derivatives usually have dipole moments larger than the one in BTH. This is also consistent with the previous observations that the dipole moment shows a positive effect on non-linear optical behaviour.…”

“…Many materials have been found to achieve an optical limiting effect based on multi-photon absorption induced excited-state absorption. 9,[17][18][19][20] Among these materials, organic molecules have attracted great interest due to their good thirdorder nonlinear optical (NLO) properties. [21][22][23] In addition, the nonlinear optical responses in these molecules are tunable by structure modifications.…”

“…Enlarging intramolecular charge transfer (ICT) was considered one of the effective ways to enhance the optical nonlinearity for most organic molecules. 17,26 It is well known that the molecules with a D–π–A structure usually show considerable charge transfer characters. 28 Here D is the donor group, A is the acceptor group, and the two groups are connected by a π bridge.…”

Effects of aggregation on the structures and excited-state absorption for zinc phthalocyanine

“…[28][29][30] In addition, the accuracy of this method has also been well tested. [31][32][33] This article is organized as follows. In the next section, we describe the methods and computational details to simulate the aggregation of ZnPc and the ESA.…”