Observation of the two-photon transition enhanced first hyperpolarizability spectra in cinnamaldehyde derivatives: A femtosecond regime study
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 (β) is essential to identifying regions where this response is intense enough to allow for applications in commercial devices. Thus, herein, we have determined the β spectral dependence of five new push–pull cinnamylidene acetophenone derivatives using femtosecond laser-induced Hyper-Rayleigh Scattering (HRS). A considerable increase in β values was observed in molecules. We found remarkable β 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 β values mediated by the 2PA transition.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 01, 2023
- Source ID
- 10.1063/5.0151622
Entities
People
- André Gasparotto Pelosi
- Carlos H. D. Dos Santos
- Cleber R Mendonca
- Diana C. G. A. Pinto
- Jonathas de Paula Siqueira
- Leandro H. Zucolotto Cocca
- Leonardo De Boni
- M G Vivas
- Maria A Faustino
- Vasco F. Batista
Organizations
- Air Force Office of Scientific Research
- Coordenação de Aperfeicoamento de Pessoal de Nível Superior
- Fundação de Amparo à Pesquisa do Estado de Minas Gerais
- National Council for Scientific and Technological Development
- São Paulo Research Foundation
- United States Army Research Laboratory
- University of Aveiro
- University of São Paulo