| Full text | |
| Author(s): |
dos Santos, Carlos H. D.
;
Cocca, Leandro Zucolotto H.
;
Pelosi, Andre Gasparotto
;
Batista, Vasco F.
;
Pinto, Diana C. G. A.
;
Faustino, M. Amparo F.
;
Vivas, Marcelo G.
;
Siqueira, Jonathas de Paula
;
Mendonca, Cleber R.
;
De Boni, Leonardo
Total Authors: 10
|
| Document type: | Journal article |
| Source: | Journal of Chemical Physics; v. 158, n. 21, p. 11-pg., 2023-06-07. |
| Abstract | |
The application of nonlinear optical effects in optoelectronic devices is still scarce because the irradiance threshold necessary to induce a specific effect is very high. In this context, knowing the frequency-resolved first order molecular hyperpolarizability (beta) is essential to identifying regions where this response is intense enough to allow for applications in commercial devices. Thus, herein, we have determined the beta spectral dependence of five new push-pull cinnamylidene acetophenone derivatives using femtosecond laser-induced Hyper-Rayleigh Scattering (HRS). A considerable increase in beta values was observed in molecules. We found remarkable beta values in regions near the two-photon resonance, which are mediated by electron withdrawing and donating groups. This effect was mapped using wavelength-tunable femtosecond Z-scan technique. Furthermore, it was modeled in light of the sum-over-states approach for the second- and third-order nonlinearities. Finally, our outcomes suggest a strategy to obtain large beta values mediated by the 2PA transition. (AU) | |
| FAPESP's process: | 11/12399-0 - Femtosecond pulses applied to nonlinear optics: spectroscopy, pulse shaping and microfabrication |
| Grantee: | Cleber Renato Mendonça |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/20032-0 - Study on Nonlinear and Charge Transport Properties of Multi-branched Molecules via Quantum Chemical Methods. |
| Grantee: | Daniel Luiz da Silva |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/20886-1 - Ultrafast nonlinear optical spectroscopy: Transient Absorption and optical Kerr Gate with polarization control |
| Grantee: | Leonardo de Boni |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/11283-7 - Nonlinear photonics: spectroscopy and advanced processing of materials |
| Grantee: | Cleber Renato Mendonça |
| Support Opportunities: | Research Projects - Thematic Grants |